In the Rio Grande Valley, air conditioners must handle high temperatures and heavy humidity. However, installing the largest system available is not always the answer. The equipment must be properly matched to the home and its ductwork.

Why AC Size Matters

Air-conditioning capacity is measured in tons. One ton of cooling equals approximately 12,000 BTUs per hour, but the correct size cannot be determined by square footage alone.

Several factors affect how much cooling a home needs, including:

• Square footage and ceiling height
• Window sizes and directions
• Insulation levels
• Air leakage
• Roof color and construction
• Number of occupants
• Heat-producing appliances
• Ductwork location and condition
• Outdoor conditions in South Texas

A professional Manual J load calculation evaluates these factors to determine the home’s actual cooling requirements.

Signs Your AC May Be Too Small

An undersized air conditioner does not have enough capacity to properly cool the home under normal design conditions.

Common signs include:

The AC Runs Constantly

An undersized system may run for long periods without reaching the thermostat setting. Longer cycles are normal during extremely hot South Texas afternoons, but a system that consistently falls behind may need to be evaluated.

The Home Does Not Reach the Thermostat Setting

If the thermostat is set to 74°F but the indoor temperature remains several degrees higher, the system may not have enough capacity. Refrigerant problems, dirty coils, poor airflow, duct leakage, and inadequate insulation can cause similar symptoms.

Some Rooms Remain Too Warm

Rooms with large windows, high ceilings, poor insulation, or inadequate ductwork may remain warmer than the rest of the home. This does not always mean the entire AC system is too small—it could be an airflow or duct-design problem.

Electricity Bills Are Higher Than Expected

A system that operates continuously can consume more electricity. However, high utility bills may also be caused by dirty equipment, duct leakage, poor insulation, low refrigerant, or incorrect thermostat settings.

The System Struggles During the Afternoon

An undersized system may keep the home comfortable in the morning but lose ground as outdoor temperatures and solar heat increase.

Signs Your AC May Be Too Large

Many homeowners believe a larger AC will cool the home better. In reality, oversized equipment can create serious comfort and humidity problems.

The System Turns On and Off Frequently

An oversized air conditioner may lower the temperature too quickly and shut off before completing a proper cooling cycle. This is called short cycling.

Frequent starting and stopping can increase wear on compressors, contactors, capacitors, and other components.

The Home Feels Cool but Humid

The evaporator coil needs sufficient run time to remove moisture from the air. If an oversized system shuts off too quickly, the thermostat may reach its setting while indoor humidity remains high.

This can make a South Texas home feel sticky or uncomfortable even at a lower temperature.

Temperatures Change Quickly

An oversized system may create noticeable temperature swings. The home becomes cold quickly, then warms up again, causing the equipment to start another short cycle.

Some Areas Feel Too Cold

A system that delivers too much cooling too quickly can make rooms near the air handler or larger supply vents uncomfortable while distant rooms remain warm.

The Equipment Is Loud When It Starts

Larger equipment requires more airflow. If the existing ductwork cannot support it, you may hear excessive air noise, whistling vents, or a loud return grille.

Ductwork Can Make a Correctly Sized AC Perform Poorly

The equipment is only one part of the system. Improperly sized, damaged, leaking, or restrictive ductwork can create symptoms that look like an equipment-sizing problem.

For example, undersized ducts can cause:

• Weak airflow
• High static pressure
• Uneven temperatures
• Excessive noise
• Longer run times
• Frozen evaporator coils
• Increased blower motor strain

Before recommending larger or smaller equipment, the duct system and airflow should also be inspected.

Can AC Size Be Determined by Square Footage?

Square footage can provide a rough starting point, but it should not be the only factor used to select equipment.

Two homes with the same square footage can have very different cooling loads. A shaded, well-insulated home with energy-efficient windows may need less cooling than a similar-sized home with poor insulation, air leakage, high ceilings, and large west-facing windows.

Rules such as “one ton for every certain number of square feet” can easily lead to oversized or undersized equipment.

The Proper Way to Size an AC System

A complete evaluation should include:

• A Manual J heating and cooling load calculation
• Review of insulation, windows, orientation, and air leakage
• Inspection of the existing ductwork
• Airflow and static-pressure measurements
• Proper equipment selection using manufacturer performance data
• Manual S equipment selection when applicable
• Consideration of indoor humidity and homeowner comfort needs

The goal is not simply to install equipment that can cool the home. The goal is to select a system that provides proper airflow, temperature control, humidity removal, efficiency, and dependable performance.

Professional AC Sizing in the Rio Grande Valley

If your air conditioner runs constantly, short cycles, leaves the home humid, or cannot maintain an even temperature, improper sizing may be part of the problem. A complete evaluation can help determine whether the cause is equipment capacity, ductwork, airflow, insulation, refrigerant, or another system issue.

JL Cooling & Heating LLC provides professional HVAC evaluations, Manual J load calculations, airflow testing, AC repair, and system installation throughout San Juan, McAllen, Mission, Edinburg, Pharr, and surrounding Rio Grande Valley communities.

Call: 956-569-4838
Visit: https://jlcandh.com

JL Cooling & Heating LLC — We don’t sell what you don’t need.

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Meta description: Learn the warning signs of an oversized or undersized air conditioner, including humidity, short cycling, long run times, uneven cooling, and high energy bills.

This is a common problem in homes throughout San Juan, McAllen, Mission, Edinburg, Pharr, and the Rio Grande Valley. Even a new, high-efficiency air conditioner may struggle when connected to undersized or poorly designed ductwork.

Why Proper Duct Size Matters

Your AC system is designed to move a specific amount of air, measured in cubic feet per minute, or CFM. The duct system must be large enough to carry that airflow without creating excessive resistance.

Think of it like trying to breathe through a small straw. Air can still pass through, but it takes much more effort. The same thing happens when an HVAC blower tries to force air through ducts that are too small.

Problems Caused by Undersized Ductwork

Weak Airflow From the Vents

Small ducts restrict the amount of air reaching each room. You may notice weak airflow from certain vents, especially in rooms farther away from the air handler.

Uneven Temperatures

Some rooms may feel comfortable while others remain warm or humid. Homeowners often blame the AC equipment, but the actual problem may be that the ductwork cannot deliver enough conditioned air to every room.

High Static Pressure

Static pressure is the resistance your HVAC system must overcome to move air. Undersized ducts can create excessive static pressure, making it harder for the blower motor to circulate air.

This can reduce system performance and place additional strain on the blower motor and other components.

Longer Running Times

When the system cannot move enough air, it may take longer to reach the thermostat setting. Longer run times can increase electrical consumption and contribute to higher utility bills during the hot South Texas summer.

Frozen Evaporator Coil

Restricted airflow can cause the evaporator coil to become too cold. Moisture may freeze on the coil and eventually block airflow completely.

A frozen coil does not automatically mean the system is low on refrigerant. Airflow problems—including dirty filters, dirty coils, blower issues, or undersized ductwork—can produce similar symptoms.

Excessive Noise

Whistling vents, loud returns, or rushing-air sounds may indicate that the duct system is trying to move too much air through an opening that is too small.

Poor Humidity Control

Humidity is a major concern in the Rio Grande Valley. Improper airflow can affect the system’s ability to remove moisture and keep the home comfortable.

The result may be a home that reaches the thermostat setting but still feels sticky or humid.

Premature Equipment Wear

A restricted duct system can place unnecessary stress on the blower motor and other HVAC components. Over time, this may contribute to breakdowns, reduced efficiency, and a shorter equipment lifespan.

Will Installing a Bigger AC Fix the Problem?

Not necessarily. Installing larger equipment on the same undersized ductwork can make the problem worse.

A larger system generally requires more airflow. If the existing ducts cannot handle it, static pressure may increase, airflow may remain inadequate, and the new system may still fail to keep the home comfortable.

Before replacing an AC system, the equipment size and duct capacity should be evaluated together. A Manual J load calculation helps determine how much heating and cooling the home needs, while proper airflow measurements help determine whether the duct system can support the selected equipment.

Signs Your Home May Have Undersized Ducts

Your ductwork may need to be evaluated if you notice:

• Weak airflow from multiple vents
• Rooms that are difficult to cool
• Large temperature differences between rooms
• Loud or whistling supply vents
• A noisy return-air grille
• Frequent evaporator coil freezing
• Long AC run times
• High electricity bills
• Excessive indoor humidity
• Blower motor problems
• Problems that started after installing a larger AC system

These symptoms can also have other causes, so the system should be tested before recommending duct replacement or modification.

How We Evaluate an Airflow Problem

At JL Cooling & Heating, we look at the complete HVAC system rather than guessing based on equipment size alone. An airflow evaluation may include:

• Measuring total external static pressure
• Checking supply and return-air restrictions
• Evaluating duct sizes and layout
• Inspecting filters, coils, grilles, and dampers
• Checking blower settings and system airflow
• Comparing the duct system with the equipment’s airflow requirements
• Looking for damaged, disconnected, or collapsed ducts

Depending on the findings, the solution may involve enlarging certain ducts, adding return-air capacity, correcting restrictive transitions, adjusting airflow, or redesigning part of the duct system. A complete duct replacement is not always necessary.

Professional Ductwork and Airflow Evaluation in the Rio Grande Valley

Properly sized ductwork can improve comfort, reduce noise, support better humidity control, and help your HVAC equipment operate as designed.

If your AC runs constantly, has weak airflow, freezes repeatedly, or cannot cool certain rooms, the duct system may be part of the problem.

Contact JL Cooling & Heating LLC for professional HVAC airflow and ductwork service in San Juan, McAllen, Mission, Edinburg, Pharr, and surrounding Rio Grande Valley communities.

Call: 956-569-4838
Visit: https://jlcandh.com

JL Cooling & Heating LLC — We don’t sell what you don’t need.

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Recognizing the warning signs early may help prevent higher electric bills, loss of cooling, and compressor damage—especially during the extreme summer heat of the Rio Grande Valley.

1. Your AC Runs but Does Not Cool the Home

One of the most common warning signs is an air conditioner that runs for long periods without reaching the thermostat setting. The air coming from the vents may feel slightly cool but not cold enough to lower the indoor temperature.

Low refrigerant reduces the system’s ability to absorb heat from inside the home and release it outdoors. However, restricted airflow, dirty coils, duct leakage, and mechanical problems can cause similar symptoms. Testing is necessary before adding refrigerant.

2. Longer Run Times and Higher Electric Bills

An air conditioner with an incorrect refrigerant charge may operate longer while providing less cooling. Longer run times can increase electricity consumption and place additional strain on the compressor and other components.

If your electric bill increases unexpectedly without a major change in the weather or thermostat settings, the system should be evaluated. Low refrigerant is one possible cause, but it is not the only one.

3. Warm Air Coming From the Vents

The air coming from the supply vents may feel warmer than normal when the system is low on refrigerant. You may also notice that certain rooms are no longer cooling evenly.

Weak airflow by itself does not prove that refrigerant is low. A dirty filter, restricted evaporator coil, blower problem, damaged ductwork, or undersized return can also reduce cooling performance.

4. Ice on the Refrigerant Lines or Evaporator Coil

Low refrigerant can cause the evaporator coil temperature to fall below freezing. Moisture in the air may then freeze on the coil or refrigerant line, creating a layer of ice.

Continuing to operate a frozen system can make the problem worse. If you notice ice, turn off the cooling system and contact a qualified HVAC contractor.

A frozen coil can also be caused by restricted airflow, a dirty coil, a blower problem, closed vents, or duct restrictions. The system should be tested instead of diagnosed by appearance alone.

5. Water Around the Indoor AC Unit

When ice on the evaporator coil begins to melt, the drain pan may receive more water than it can handle. This can create water around the air handler, furnace, or drain line.

Water near the indoor unit can also result from a clogged drain, damaged drain pan, poor equipment leveling, or an improperly installed drain system. Shut the system off if water could damage the home or reach electrical components.

6. Hissing or Bubbling Sounds

A hissing sound near a refrigerant line, coil, or connection may indicate refrigerant escaping through a small opening. A bubbling sound can sometimes occur when refrigerant leaks from part of the system.

Not every unusual sound means there is a refrigerant leak. A technician may need to use electronic leak detection, soap bubbles, nitrogen pressure testing, or another approved method to locate the source.

7. Poor Indoor Humidity Control

Air conditioners in South Texas must remove both heat and moisture. If the refrigerant level or system operation is incorrect, humidity control may suffer. The home may begin to feel sticky or uncomfortable even when the thermostat shows a reasonable temperature.

High indoor humidity can also be related to oversized equipment, excessive airflow, duct leakage, outside-air infiltration, or improper thermostat settings. A complete system evaluation helps identify the actual cause.

8. The Outdoor Unit Runs Constantly or Shuts Down

Low refrigerant may cause the outdoor unit to run for extended periods as it struggles to satisfy the thermostat. Some systems may eventually shut down through a safety control, while others may continue operating under stressful conditions.

Repeatedly resetting the system will not correct the underlying problem and could lead to more expensive damage.

Refrigerant Does Not Normally Need Routine Topping Off

An air-conditioning system is designed as a sealed refrigerant circuit. Under normal conditions, refrigerant circulates through the system and does not get used up.

If a system requires refrigerant repeatedly, simply adding more is not a complete repair. The contractor should determine whether a leak is present, explain the available repair options, and verify the final refrigerant charge according to the equipment manufacturer’s specifications.

Why an Accurate Diagnosis Matters

Several HVAC problems can look like low refrigerant. Before refrigerant is added, a qualified technician should inspect:

• The air filter and evaporator coil
• Blower operation and system airflow
• Supply and return-air temperatures
• Refrigerant pressures and line temperatures
• Superheat or subcooling, when applicable
• Signs of oil or refrigerant leakage
• Duct restrictions and return-air problems
• The condition of the outdoor coil

Adding refrigerant without checking airflow and system conditions can result in an incorrect charge and may not solve the original problem.

AC Refrigerant Leak Testing in the Rio Grande Valley

If your air conditioner is running constantly, blowing warm air, freezing, or no longer controlling humidity, have it inspected before the problem becomes more serious.

JL Cooling & Heating provides air-conditioning diagnostics, refrigerant leak detection, airflow evaluations, and AC repair throughout San Juan, McAllen, Pharr, Mission, Edinburg, Alamo, Donna, Weslaco, and surrounding Rio Grande Valley communities.

We identify the cause of the cooling problem before recommending repairs because we don’t sell what you don’t need.

Visit jlcandh.com or call 956-569-4838 to schedule service.

In the Rio Grande Valley, air conditioners operate through long periods of extreme heat and high humidity. Even high-efficiency equipment may struggle when it is not sized, installed, and adjusted correctly.

The Equipment Is Only Part of the System

An HVAC system is more than the outdoor condenser and indoor air handler. Its performance depends on several factors working together:

• Proper equipment sizing
• Correct ductwork and airflow
• Accurate refrigerant charge
• Safe electrical connections
• Proper condensate drainage
• Correct thermostat and control settings
• Approved equipment matching
• Complete start-up testing

If any of these areas are overlooked, a new system may not deliver the comfort or efficiency the homeowner expected.

Proper Equipment Sizing Matters

A larger air conditioner is not automatically better.

An oversized system may cool the home too quickly and shut off before removing enough moisture. This can leave the home feeling cold but humid. An undersized system may run excessively and struggle to maintain the desired temperature during extreme weather.

A professional contractor should consider the home’s square footage, insulation, windows, orientation, air leakage, occupancy, and other heat-producing factors. When necessary, a Manual J load calculation provides a more accurate way to select equipment than simply installing the same size as the old system.

Airflow and Ductwork Affect the Entire System

New equipment cannot perform correctly if the ductwork is undersized, damaged, leaking, or poorly designed. Restricted airflow can cause:

• Uneven temperatures throughout the home
• Weak airflow from supply vents
• Excessive system noise
• High static pressure
• Longer run times and increased electricity use
• Poor humidity removal
• Frozen evaporator coils
• Additional strain on blower motors and compressors

Before installing new equipment, the contractor should evaluate the return air, supply ducts, filters, grilles, and available airflow. Duct improvements may be necessary for the new system to operate as designed.

The Refrigerant Charge Must Be Correct

Too much or too little refrigerant can reduce performance and place unnecessary stress on the compressor.

The proper refrigerant charge cannot always be confirmed by pressure alone. Start-up procedures may include checking superheat, subcooling, indoor and outdoor temperatures, airflow, and the manufacturer’s charging instructions.

Small installation errors can eventually lead to poor cooling, higher operating costs, and premature component failure.

Drainage and Electrical Work Should Not Be Overlooked

South Texas air conditioners remove a large amount of moisture from indoor air. The drain system must be properly installed, supported, trapped when required, and tested to reduce the risk of leaks, clogs, and water damage.

Electrical connections, disconnects, breakers, wire sizing, grounding, and voltage should also be inspected. Loose or improper connections can create service problems and shorten the life of electrical components.

Start-Up Testing Makes a Difference

Turning the system on is not the same as properly commissioning it. After installation, the contractor should confirm that the equipment is operating within the manufacturer’s specifications.

Important checks may include:

• Supply and return air temperatures
• Total external static pressure
• System airflow
• Refrigerant readings
• Voltage and amperage
• Thermostat operation
• Condensate drainage
• Heating and cooling operation
• Equipment configuration and control settings

These measurements can identify installation problems before they become expensive repairs or comfort complaints.

Do Not Compare HVAC Estimates by Price Alone

Two estimates may include the same size or brand of equipment while providing very different levels of installation quality.

Before selecting an HVAC contractor, ask:

• Is the proposed system properly sized for my home?
• Are the indoor and outdoor units an approved match?
• Will you inspect the existing ductwork and airflow?
• Are permits or inspections required?
• What electrical work, drain modifications, accessories, and duct changes are included?
• Will the system be tested after installation?
• Who will register the manufacturer’s warranty?
• What labor and workmanship warranties are included?

A detailed estimate makes it easier to understand what you are paying for and prevents important work from being excluded from the comparison.

A Quality Installation Protects Your Investment

Even the best HVAC equipment can perform poorly when installed incorrectly. Proper installation can help provide more consistent comfort, better humidity control, lower energy consumption, fewer service problems, and longer equipment life.

Price is important, but it should not be the only deciding factor. The contractor’s experience, installation procedures, system design, warranty support, and final testing can have a much greater impact on the total cost of owning the system.

JL Cooling & Heating provides professional air-conditioning installation and replacement services throughout San Juan, McAllen, Pharr, Mission, Edinburg, Alamo, Donna, Weslaco, and surrounding Rio Grande Valley communities.

We evaluate equipment sizing, ductwork, airflow, and overall system operation to help homeowners receive the performance they expect from their investment.

To schedule an HVAC evaluation or request an installation estimate, visit jlcandh.com or call 956-569-4838.

Is this equipment still covered by the manufacturer’s warranty?

Recently, a homeowner with a new-construction home contacted us after another contractor told him his air conditioning system was no longer under factory warranty and recommended replacing the system.

Something didn’t sound right to the homeowner.

He knew he had owned the home for less than five years, so he contacted JL Cooling & Heating LLC and asked us to take another look.

We’re glad he did.

We Checked the Warranty Before Recommending Replacement

Instead of assuming the equipment was out of warranty based only on its age, we looked further into the history of the system.

After verifying the information, we determined that warranty coverage was available and were able to submit the condenser fan motor as a manufacturer warranty claim.

That made a significant difference for the homeowner.

The lesson is simple:

Before replacing an AC system because of a failed component, verify the manufacturer’s warranty carefully.

Why AC Warranty Dates Can Be Confusing

Determining the warranty status of HVAC equipment isn’t always as simple as looking at the manufacture date on the serial number.

Depending on the manufacturer, warranty terms, registration status, and circumstances, there may be several dates or records worth investigating.

1. Equipment Manufacture Date

The model and serial number can often be used to determine approximately when the equipment was manufactured.

But the date an air conditioner was manufactured isn’t necessarily the same date the homeowner’s warranty coverage began.

Equipment can be manufactured and then spend time in distribution or inventory before being installed.

2. Equipment Sale or Installation Records

Another important piece of information may be when the equipment was sold or installed.

Invoices, distributor records, registration information, and installation documentation can sometimes help establish the history of the HVAC system.

3. Closing Date on a New-Construction Home

This is particularly important for homeowners purchasing new construction.

The HVAC equipment may have been manufactured and installed months before the homeowner actually closed on the property.

Depending on the manufacturer’s applicable warranty terms, the home’s closing or purchase documentation may be important when establishing the warranty start date.

This is why homeowners should keep their closing documents and HVAC paperwork.

Manufacturer warranty requirements vary, so the actual warranty terms for the specific brand and equipment always need to be verified.

Don’t Assume an Older Manufacture Date Means No Warranty

Imagine an air conditioner manufactured well before a new home was completed.

If someone looks only at the serial number and manufacture date, they could potentially reach the wrong conclusion about warranty coverage.

For new-construction homes, we believe it is worth asking additional questions:

When was the home completed?

When did the homeowner close on the property?

When was the equipment installed or sold?

Was the equipment registered?

What does the manufacturer’s warranty policy say for new construction?

A few extra minutes of investigation could potentially save a homeowner from paying for a part that qualifies for warranty coverage—or from unnecessarily replacing equipment.

HVAC Warranty Registration Can Also Matter

Homeowners should also understand that manufacturer warranties aren’t all the same.

Depending on the manufacturer, equipment registration may affect the length or type of warranty coverage available.

Some manufacturers provide different coverage for properly registered equipment, while other circumstances—such as new construction—may have their own requirements.

That’s why we recommend keeping records of:

• HVAC model and serial numbers
• Installation paperwork
• Warranty registration confirmation
• Builder information
• Purchase invoices when available
• New-home closing documents
• Previous HVAC service records

Having this information available can make warranty verification much easier when a component fails several years later.

A Failed Part Doesn’t Automatically Mean You Need a New AC

There are situations where replacing an older air conditioner makes financial sense.

But a failed motor, circuit board, compressor, coil, or another component shouldn’t automatically become a system replacement without evaluating the equipment first.

We believe homeowners deserve to know their options.

Before recommending replacement, a contractor should consider the age and condition of the equipment, repair cost, refrigerant type, efficiency, history of failures, and available manufacturer warranty coverage.

Sometimes replacement is the right decision.

Sometimes repair is the better decision.

And sometimes the failed component may still be covered by the factory warranty.

Details Matter in HVAC Service

The experience with this homeowner is a good reminder of why asking questions matters.

The first contractor reportedly determined that the equipment didn’t have warranty coverage and attempted to sell the homeowner a replacement system.

The homeowner questioned that conclusion because he knew the home wasn’t even five years old.

After we investigated further, we were able to submit the condenser fan motor for warranty consideration.

Taking the time to verify the details can make a real difference for a homeowner.

At JL Cooling & Heating LLC, our goal isn’t to replace equipment simply because something failed. We want to determine what’s wrong, understand the available options, and provide the homeowner with the information needed to make an informed decision.

Think Your AC Might Still Be Under Warranty?

If you’re having an AC repair problem in San Juan, McAllen, Edinburg, Mission, Pharr, Alamo, or the surrounding Rio Grande Valley, don’t assume your system is out of warranty simply because someone tells you it is.

Especially with a new-construction home, there may be additional information that needs to be considered.

Have your model number, serial number, installation information, and new-home closing date available. The manufacturer’s specific warranty terms can then be reviewed to determine whether coverage may still apply.

A little research could potentially save you from an unnecessary expense.

JL Cooling & Heating LLC

We don’t sell what you don’t need.

Sometimes a dehumidifier is the right solution—but not always.

Here in San Juan, McAllen, Edinburg, Mission, Pharr, and throughout the Rio Grande Valley, high outdoor humidity makes moisture control an important part of home comfort. Before adding another piece of equipment, it is important to determine why the indoor humidity is high in the first place.

This is especially important with today’s spray-foam insulated homes.

At JL Cooling & Heating LLC, we believe the first question should be:

Is the home producing a humidity problem, or is the HVAC system not removing enough moisture?

What Should Indoor Humidity Be?

For many homes, an indoor relative humidity around 40% to 60% is generally comfortable, with conditions often feeling better toward the middle of that range.

In South Texas, maintaining lower humidity can be challenging because of our hot and humid climate.

If your home regularly stays above 60% relative humidity, especially while the air conditioner is operating normally, it may be worth investigating the cause.

Simply lowering the thermostat isn’t necessarily the answer.

How Does Your Air Conditioner Remove Humidity?

Your AC system does two jobs:

It lowers the temperature, and it removes moisture from the air.

When warm indoor air passes across the cold evaporator coil, moisture condenses on the coil and drains away through the condensate system.

But the air conditioner needs adequate runtime to remove that moisture.

This is where AC sizing becomes extremely important.

Could Your Air Conditioner Be Too Large?

Yes.

An oversized AC system can cool a house very quickly.

That sounds like a good thing, but it can create a comfort problem.

The thermostat may reach its temperature setting before the air conditioner has operated long enough to remove enough moisture from the air.

The result can be a home that is 72°F or 74°F but still feels humid and uncomfortable.

This is one reason we don’t recommend choosing an air conditioner based only on the size of the old system or the square footage of the house.

A home that had a 4-ton system before doesn’t automatically need another 4-ton system.

Spray-Foam Homes Can Change the Cooling Load

Spray-foam insulation can dramatically change how a house gains and loses heat.

A properly constructed foam-insulated home can have a significantly lower cooling load than a similar home with traditional insulation and a vented attic.

That means equipment sizing becomes even more important.

For example, replacing an older AC system with the same tonnage after a home has been improved with spray foam could potentially leave the house with more cooling capacity than it actually needs.

The AC may satisfy the thermostat quickly while struggling to provide the longer cycles needed for effective moisture removal.

That doesn’t mean spray foam is causing the humidity problem.

It means the house and HVAC system need to work together as a complete system.

Was a Manual J Load Calculation Performed?

Before installing or replacing an HVAC system, one of the most important questions is:

Was a proper Manual J load calculation performed?

A Manual J calculation determines how much heating and cooling the home actually requires.

It considers factors such as:

• Home size and layout
• Insulation type and R-value
• Spray-foam location
• Windows and doors
• Window orientation
• Ceiling height
• Air leakage
• Construction materials
• Occupancy
• Internal heat loads
• Local outdoor design conditions

This is particularly important with spray-foam homes in South Texas.

Simply using a rule such as “one ton per certain number of square feet” doesn’t account for how the house is actually constructed.

What Is Manual S and Why Does It Matter?

Manual J tells us approximately how much heating and cooling the house needs.

Manual S helps us select equipment that can properly meet that calculated load.

These are two different steps.

A contractor shouldn’t simply calculate the load and then choose equipment based only on the tonnage printed on the condenser.

The actual performance of the equipment needs to be considered.

This includes both sensible cooling and latent cooling.

Sensible Cooling

Sensible capacity primarily deals with lowering the temperature.

Latent Cooling

Latent capacity deals with removing moisture from the air.

In a humid climate like the Rio Grande Valley, both matter.

A system can be excellent at lowering temperature but still leave homeowners uncomfortable if moisture removal isn’t adequate.

What About Variable-Speed and Inverter AC Systems?

Two-stage, variable-speed, and inverter HVAC systems can provide advantages for humidity control because they can often operate at reduced capacity for longer periods.

Longer operation can provide more opportunity for moisture to condense on the evaporator coil.

But even advanced equipment needs to be properly sized, configured, and installed.

Installing an oversized inverter system isn’t a substitute for determining the home’s actual cooling requirements.

Could Airflow Be Causing High Humidity?

Equipment size isn’t the only thing we look at.

Airflow can also affect how an air conditioner removes moisture.

The HVAC system needs to be properly configured for the equipment and application. Blower settings, ductwork, static pressure, filtration, evaporator coil performance, and equipment setup can all affect system performance.

Other potential causes of excessive indoor humidity can include:

• Air leaks around doors and windows
• Duct leakage
• Outside-air infiltration
• Improper ventilation
• Bathroom or kitchen moisture
• Condensate drainage problems
• HVAC equipment or control problems
• Incorrect blower settings
• Building-envelope issues

With a spray-foam home, ventilation and building pressure also deserve attention because the house may be considerably tighter than a conventionally insulated home.

So, Do I Need a Whole-Home Dehumidifier?

Possibly—but we shouldn’t automatically start there.

A whole-home dehumidifier can be an excellent solution when a home has a legitimate latent moisture load that the properly sized HVAC system cannot adequately handle on its own.

But if the real problem is an oversized AC system, incorrect airflow, duct leakage, equipment configuration, or another HVAC issue, simply adding a dehumidifier may treat the symptom without addressing the underlying cause.

Before recommending one, we believe it makes sense to ask:

Is the AC properly sized?

Was a Manual J performed?

Was the equipment properly selected using Manual S?

Is the airflow correct?

Is the HVAC system operating as designed?

Is outside moisture entering the home?

How tight is the building envelope?

Once those questions are answered, we can make a better decision about whether additional dehumidification is actually necessary.

High Indoor Humidity in San Juan and the Rio Grande Valley?

If your home is cool but still feels humid, don’t automatically assume you need a bigger air conditioner—or immediately purchase a dehumidifier.

There may be a reason your existing HVAC system isn’t controlling moisture properly.

JL Cooling & Heating LLC can help evaluate AC performance, airflow, equipment sizing, and indoor humidity concerns for homeowners in San Juan, McAllen, Edinburg, Mission, Pharr, Alamo, and surrounding Rio Grande Valley communities.

For new and replacement systems, proper Manual J load calculations and Manual S equipment selection can help ensure that the air conditioner is selected for the home’s actual cooling requirements rather than simply replacing the old equipment with the same tonnage.

The goal isn’t just to make your home cold.

The goal is to make it comfortable.

JL Cooling & Heating LLC

We don’t sell what you don’t need.

But what exactly does an inverter air conditioner do, and why are systems such as the Daikin FIT becoming an option for homeowners looking for better comfort and efficiency?

At JL Cooling & Heating LLC, we believe homeowners should understand the equipment they’re buying and how it can benefit their home.

What Is an Inverter Air Conditioner?

A traditional single-stage air conditioner typically operates at full capacity whenever cooling is needed. It turns on, cools the home, and then shuts off when the thermostat is satisfied.

An inverter air conditioner works differently.

Instead of operating only at full capacity, inverter technology allows the compressor to adjust its operation based on the cooling demand of the home.

When the house needs a lot of cooling, the system can increase its output. When less cooling is required, it can reduce its output and continue operating at a lower capacity.

Think of it like driving a vehicle.

Instead of constantly pressing the accelerator all the way down and then letting completely off, an inverter system can adjust its speed to match what is needed.

What Is the Daikin FIT?

The Daikin FIT is a compact HVAC system that uses inverter-driven compressor technology.

Rather than relying only on traditional ON/OFF operation, the system can adjust its capacity as conditions change.

This makes the Daikin FIT an attractive option for homeowners looking for better temperature control, quieter operation, energy efficiency, and improved indoor comfort.

Its compact outdoor design can also be beneficial for homes where space around the outdoor equipment is limited.

Why Inverter Technology Works Well in South Texas

Homes in McAllen, Edinburg, Mission, Pharr, San Juan, Alamo, and throughout the Rio Grande Valley experience long cooling seasons.

But your home doesn’t require maximum cooling capacity every minute of the day.

Outdoor temperature, sunlight, humidity, occupancy, and other conditions constantly change the amount of cooling your home needs.

An inverter system can respond to those changing conditions instead of operating at full capacity every time the thermostat calls for cooling.

Benefits of an Inverter AC System

More Consistent Temperatures

One of the biggest advantages of inverter technology is comfort.

Because the compressor can adjust its output, the system can provide longer and steadier cooling instead of repeatedly cycling between full cooling and completely off.

This can help reduce noticeable temperature swings inside the home.

Better Humidity Control

Humidity is especially important here in the Rio Grande Valley.

Your air conditioner doesn’t just cool the air—it also removes moisture.

Longer cooling cycles at lower capacities can provide more opportunity for moisture to condense on the evaporator coil and be removed from the home.

When properly sized, configured, and installed, an inverter HVAC system can provide excellent humidity control.

Potential Energy Savings

An inverter system doesn’t necessarily need to operate at maximum capacity every time cooling is required.

During periods of lower cooling demand, it can operate at reduced capacity.

This ability to better match the home’s cooling load can improve overall efficiency compared with less flexible equipment, although actual energy use depends on the home, equipment selection, thermostat settings, weather, ductwork, and installation.

Quieter Operation

The Daikin FIT is designed around a compact, side-discharge outdoor unit.

Because an inverter system can spend significant amounts of time operating below maximum capacity, homeowners may notice quieter operation compared with some conventional systems.

This can be particularly useful when the outdoor condenser is located close to a bedroom, patio, window, or neighboring property.

Inverter vs. Two-Stage AC

A two-stage air conditioner gives the system two primary levels of cooling capacity.

An inverter system can adjust its compressor operation across a broader operating range.

An easy way to understand the difference is:

Single-stage: essentially one cooling level.

Two-stage: a lower stage and a higher stage.

Inverter: can continuously adjust its operation within the system’s designed operating range.

This gives an inverter system greater flexibility to respond to changing cooling demands.

Does an Inverter AC Run Longer?

It can—and that isn’t necessarily a bad thing.

Homeowners sometimes assume an efficient air conditioner should turn on, cool the house quickly, and shut off.

But short cooling cycles aren’t always desirable.

An inverter system may operate for longer periods at reduced capacity to maintain a steady indoor temperature.

Longer, lower-capacity operation can help provide more consistent comfort and better humidity removal while avoiding unnecessary full-capacity operation.

Proper AC Sizing Still Matters

Inverter technology does not eliminate the importance of properly sizing your air conditioner.

Installing equipment that is unnecessarily large can still affect comfort and system performance.

A professional Manual J load calculation can help determine how much heating and cooling the home actually requires.

A proper load calculation considers more than square footage. It can include:

• Insulation
• Windows and doors
• Ceiling height
• Home orientation
• Air leakage
• Construction materials
• Occupancy
• Internal heat loads
• South Texas outdoor design conditions

Once the cooling load is known, the appropriate equipment can be selected for the home.

Is a Daikin FIT Right for Your Home?

The Daikin FIT can be a good option for homeowners interested in inverter AC technology, quieter operation, consistent temperatures, humidity control, and a compact outdoor unit.

However, there isn’t one HVAC system that’s best for every house.

The equipment needs to match the home’s cooling requirements, duct system, airflow, electrical requirements, and the homeowner’s priorities and budget.

That’s why we don’t believe in automatically recommending the most expensive equipment.

We believe in recommending the equipment that makes sense for the home.

Daikin FIT and Inverter AC Installation in the Rio Grande Valley

If you’re considering replacing your air conditioner, JL Cooling & Heating LLC can help you determine whether a traditional, two-stage, or inverter HVAC system such as the Daikin FIT is appropriate for your home.

We provide AC replacement, HVAC installation, air conditioning repair, and residential HVAC services throughout San Juan, McAllen, Edinburg, Mission, Pharr, Alamo, and surrounding Rio Grande Valley communities.

Proper equipment selection and installation can make a major difference in comfort, humidity control, efficiency, and long-term system performance.

JL Cooling & Heating LLC

We don’t sell what you don’t need.

For homeowners in McAllen, Edinburg, Mission, Pharr, San Juan, and throughout the Rio Grande Valley, a two-stage air conditioner can provide better comfort, humidity control, and efficiency compared with a traditional single-stage system.

At JL Cooling & Heating LLC, we believe homeowners should understand how their HVAC equipment works before deciding which system is right for their home.

What Is a Two-Stage Air Conditioner?

A traditional single-stage air conditioner basically has two operating modes: ON and OFF.

When the thermostat calls for cooling, the compressor operates at full capacity until the thermostat reaches the desired temperature. Then the system shuts off.

A two-stage air conditioner can operate at two different cooling capacities.

Stage 1 — Lower Capacity

The air conditioner operates at a reduced capacity when the home only needs a moderate amount of cooling.

Stage 2 — Full Capacity

When outdoor temperatures rise or the home requires additional cooling, the system can operate at its higher capacity.

The exact capacity percentages vary depending on the manufacturer and equipment, so Stage 1 should not automatically be assumed to be a specific percentage.

Why Is Two-Stage Cooling Helpful in South Texas?

Here in the Rio Grande Valley, our air conditioners don’t just have to deal with high temperatures. Humidity is also an important part of indoor comfort.

During periods when the home doesn’t require the system’s full cooling capacity, a two-stage system can spend more time operating in its lower stage.

Longer, steadier cooling cycles can help maintain more consistent indoor temperatures and may improve humidity removal compared with a system that frequently turns on at full capacity and quickly shuts back off.

Benefits of a Two-Stage AC System

1. More Consistent Indoor Temperatures

Instead of constantly going from completely off to full cooling capacity, a two-stage system can use its lower stage during lighter cooling conditions.

This can help reduce noticeable temperature swings and provide more consistent comfort throughout the home.

2. Better Humidity Control

Air conditioners remove moisture from indoor air as they cool.

Longer cooling cycles generally provide the evaporator coil more time to remove moisture from the air. When properly sized and installed, a two-stage system can therefore help maintain better indoor humidity levels.

This can be especially valuable in South Texas and the Rio Grande Valley, where high humidity can make a home feel uncomfortable even when the thermostat shows a reasonable temperature.

3. Potential Energy Savings

Your home doesn’t always need 100% of the air conditioner’s capacity.

During milder conditions, mornings, evenings, and lower-load periods, a two-stage system may be able to satisfy the home’s cooling needs using its lower stage.

Actual energy savings depend on the equipment, home, thermostat settings, duct system, insulation, weather, and how the system is installed.

4. Quieter Operation

Because the equipment can operate at a lower capacity during Stage 1, a properly designed two-stage HVAC system may operate more quietly during lower-demand periods than when running at full capacity.

5. Longer, More Comfortable Cooling Cycles

Longer cycles aren’t necessarily a bad thing.

An air conditioner that is properly sized should run long enough to maintain temperature and remove moisture effectively. Short cycling can reduce comfort, humidity removal, and potentially equipment life.

Two-stage equipment gives the system another level of capacity to better match changing cooling demands.

Does Two-Stage Equipment Mean You Need a Bigger AC?

No.

Two-stage operation should not be used as an excuse to oversize an air conditioner.

Installing a larger system than the home needs can contribute to short cycling and poor humidity control.

That’s why proper equipment selection should start with a Manual J load calculation to determine the home’s heating and cooling requirements, followed by proper equipment selection.

Factors such as insulation, windows, air leakage, orientation, ceiling height, construction, and local South Texas design conditions can all affect the amount of cooling a home actually needs.

Single-Stage vs. Two-Stage AC

A single-stage system can still be an excellent choice when it is properly sized and installed.

The advantage of two-stage equipment is its ability to better adjust to changing cooling demands.

Think of it this way:

A single-stage system has essentially one cooling gear.

A two-stage system has a lower gear and a higher gear.

The system can use the lower stage when cooling demand is lighter and move to full capacity when the home needs additional cooling.

Is a Two-Stage Air Conditioner Worth It?

That depends on your home and what you expect from your HVAC system.

If you’re looking for more consistent temperatures, improved humidity control, quieter operation, and potentially better efficiency, a two-stage system may be worth considering.

But equipment technology is only part of the equation.

Proper AC sizing, airflow, ductwork, refrigerant charging, thermostat setup, and installation quality are just as important as the equipment itself.

An expensive two-stage system that is improperly sized or installed may not provide the comfort or efficiency you expected.

Two-Stage AC Installation in the Rio Grande Valley

If you’re considering replacing your air conditioner, JL Cooling & Heating LLC can help determine which type and size of HVAC system is appropriate for your home.

We serve homeowners throughout San Juan, McAllen, Edinburg, Mission, Pharr, Alamo, and surrounding Rio Grande Valley communities.

Whether you’re considering a single-stage, two-stage, heat pump, or variable-capacity HVAC system, understanding your home’s actual cooling requirements is the first step toward better comfort.

JL Cooling & Heating LLC

We don’t sell what you don’t need.

As an AC system gets older, normal wear, dirty components, declining motor performance, refrigerant issues, and years of operating in the South Texas heat can affect how well the system cools and controls humidity.

At JL Cooling & Heating LLC, we believe homeowners should understand the condition and performance of their existing equipment before deciding whether an AC repair or AC replacement makes the most sense.

Does an Air Conditioner Lose Efficiency as It Gets Older?

Age alone doesn’t automatically make an air conditioner inefficient. A well-maintained older HVAC system can sometimes continue performing reliably for many years.

However, as equipment ages, several factors can gradually affect AC efficiency and cooling performance.

These may include:

• Dirty condenser or evaporator coils
• Restricted airflow
• Worn blower motors
• Weak capacitors or electrical components
• Refrigerant leaks
• Deteriorating insulation
• Dirty blower wheels
• Compressor wear
• Aging ductwork
• Poor previous maintenance

An older system that has been properly maintained may perform considerably better than a newer system that has been neglected.

That’s why system condition matters just as much as system age.

Why South Texas Is Hard on Air Conditioning Equipment

Air conditioners in McAllen, San Juan, Pharr, Mission, Edinburg, Alamo, and throughout the Rio Grande Valley operate under demanding conditions.

Long cooling seasons, high outdoor temperatures, humidity, dust, and extended run times can put considerable stress on HVAC equipment.

During the hottest parts of the year, an AC system may operate for many hours each day. Over years of service, that operating time adds up.

This makes regular AC maintenance in South Texas particularly important.

Signs an Older AC System May Be Losing Performance

An aging air conditioner doesn’t always fail suddenly. In many cases, homeowners begin noticing smaller changes first.

Common signs include:

✅ Longer AC run times
✅ Higher electric bills without a major change in usage
✅ Difficulty maintaining the thermostat setting
✅ Uneven temperatures throughout the home
✅ Higher indoor humidity
✅ More frequent AC repairs
✅ Unusual noises from the indoor or outdoor equipment
✅ Reduced airflow from the vents

These symptoms don’t automatically mean you need a new air conditioner. Many can also be caused by repairable problems.

Proper HVAC diagnostics should come before recommending replacement.

Can Cleaning an Older AC System Improve Efficiency?

In many cases, maintenance can improve the performance of an existing system.

A dirty condenser coil can make it harder for the air conditioner to reject heat outdoors. A dirty evaporator coil, filter, or blower wheel can restrict airflow and affect system operation.

Professional AC maintenance may include inspecting and cleaning components, checking airflow, evaluating electrical components, flushing the condensate drain, and checking overall system performance.

Maintenance won’t turn an older air conditioner into a brand-new high-efficiency system, but keeping equipment clean and operating correctly can help it perform closer to its capabilities.

Older AC Systems vs. New High-Efficiency Equipment

Modern HVAC equipment can offer higher efficiency ratings than many systems installed years ago. However, simply buying the highest-efficiency air conditioner doesn’t guarantee the lowest electric bill.

Equipment sizing, ductwork, airflow, installation quality, thermostat settings, insulation, humidity control, and homeowner usage all affect energy consumption.

A properly installed system with good airflow can often be more valuable than focusing on the efficiency rating alone.

This is also why proper HVAC design matters when replacing older equipment.

Don’t Automatically Replace an Old AC With the Same Tonnage

If your existing system is 10, 15, or even 20 years old, don’t assume the replacement should automatically be the same size.

The original system may have been oversized or undersized. The home may also have changed since the equipment was installed.

You may have added:

• New windows
• Additional insulation
• Spray foam
• New doors
• Roofing improvements
• Home additions or remodeling

These changes can affect the home’s cooling requirements.

That’s where a Manual J load calculation becomes important.

Manual J Helps Determine the Proper AC Size

A Manual J load calculation determines how much heating and cooling a home actually needs based on the characteristics of the house and local design conditions.

Instead of choosing AC tonnage based only on square footage or the size of the old system, Manual J considers factors such as insulation, windows, orientation, construction, air leakage, and other sources of heat gain.

After determining the home’s load, Manual S equipment selection can be used to help match HVAC equipment to those calculated requirements.

Manual J tells us what the home needs. Manual S helps determine which equipment can meet those needs.

This can be particularly important when replacing an older AC system with modern equipment.

When Should You Consider AC Replacement?

There isn’t one specific age when every air conditioner needs to be replaced.

Instead, consider the entire condition of the HVAC system.

An older system that is reliable, properly maintained, and still performing well may not need immediate replacement.

However, replacement may become worth considering when an aging system begins experiencing frequent AC repairs, declining comfort, major component failures, refrigerant problems, or increasing operating costs.

The cost of the repair should also be compared with the condition and expected remaining life of the equipment.

Should You Repair or Replace Your Air Conditioner?

The right answer depends on the system.

At JL Cooling & Heating LLC, we believe homeowners should receive enough information to make that decision themselves.

Sometimes an AC repair is the practical choice.

Sometimes investing additional money into significantly older equipment doesn’t make financial sense.

And sometimes the system simply needs maintenance.

The important part is properly diagnosing the problem before making the recommendation.

AC Maintenance, Repair & Replacement in the Rio Grande Valley

If your older air conditioner isn’t cooling like it used to, don’t assume you automatically need a new system.

Have the equipment evaluated first.

JL Cooling & Heating LLC provides AC repair, HVAC maintenance, AC replacement, and HVAC installation in San Juan, McAllen, Pharr, Mission, Edinburg, Alamo, and surrounding Rio Grande Valley communities.

We’ll help you understand what’s happening with your system and discuss the available options.

JL Cooling & Heating LLC
We don’t sell what you don’t need.
📞 (956) 569-4838
🌐 jlcandh.com

Manual J Load Calculation & Manual S: Why Proper AC Sizing Matters in South Texas

When it’s time for an AC replacement in South Texas, many homeowners assume the safest choice is to replace their existing air conditioner with the same size system.

If you currently have a 4-ton AC, you replace it with another 4-ton AC.

But there’s one problem: the original air conditioner may not have been sized correctly in the first place.

At JL Cooling & Heating LLC, we believe a professional HVAC installation should start by determining how much heating and cooling your home actually needs. That process begins with a Manual J load calculation and continues with Manual S equipment selection.

What Is a Manual J Load Calculation?

A Manual J load calculation is a detailed calculation used to determine the heating and cooling requirements of a home.

Instead of sizing an air conditioner based only on square footage or the size of the existing AC system, Manual J evaluates the characteristics of the home that affect heat gain and heat loss.

A Manual J calculation can take into account:

• Home size and floor plan
• Ceiling height
• Insulation levels
• Window size and type
• Window orientation and sun exposure
• Exterior wall construction
• Air leakage and infiltration
• Number of occupants
• Internal heat loads
• Local outdoor design temperatures

These factors are especially important when sizing an air conditioner in South Texas, where high temperatures and humidity can place significant demands on an HVAC system.

Why Square Footage Alone Isn’t Enough to Size an AC System

Two 2,000-square-foot homes in McAllen or San Juan, Texas, can have completely different cooling loads.

For example, a newer home with good insulation, efficient windows, and less air leakage may require less cooling than an older 2,000-square-foot home with poor insulation, older windows, and greater heat gain.

That’s why rules such as “one ton of AC for every certain number of square feet” should not replace a proper HVAC load calculation.

Manual J helps determine the actual cooling load of the home instead of guessing at AC tonnage.

Why Is Manual J Important for AC Replacement?

Correct AC sizing affects more than how cold your home gets.

An oversized air conditioner may satisfy the thermostat quickly and shut off before providing the longer operating cycles needed for effective moisture removal. In our hot and humid Rio Grande Valley climate, that can contribute to higher indoor humidity and uncomfortable conditions.

An undersized AC system, on the other hand, may have difficulty maintaining the desired indoor temperature during hotter conditions.

A properly performed Manual J HVAC load calculation provides the foundation for choosing an air conditioning system based on the home’s actual cooling requirements.

But calculating the load is only the beginning.

Manual J Determines the Load — Manual S Selects the Equipment

Once the Manual J calculation determines the home’s heating and cooling requirements, the next step is Manual S equipment selection.

Manual S is used to help select HVAC equipment capable of meeting the load determined by Manual J.

This is important because AC tonnage alone doesn’t tell you exactly how an air conditioner will perform under every condition.

A system commonly called a 3-ton air conditioner has a nominal capacity of approximately 36,000 BTUs per hour, but that doesn’t mean it will always deliver exactly 36,000 BTUs under actual operating conditions.

The equipment’s available capacity can change based on factors including:

• Outdoor temperature
• Indoor temperature
• Indoor humidity
• Airflow across the evaporator coil
• Indoor and outdoor equipment combination
• Sensible cooling capacity
• Latent cooling capacity

Manual S takes the results from Manual J and helps match those requirements to the performance of the actual HVAC equipment being considered.

Manual J + Manual S = Better HVAC Equipment Selection

A simple way for homeowners to understand the difference is:

Manual J = How much heating and cooling does my home need?

Manual S = Which HVAC equipment can properly meet those requirements?

When used together, Manual J and Manual S help reduce the chances of installing an air conditioner that is unnecessarily large or too small for the home.

Proper HVAC sizing and equipment selection can contribute to:

✅ Better temperature control
✅ Improved indoor humidity control
✅ More consistent home comfort
✅ Proper airflow and system performance
✅ Reduced unnecessary cycling
✅ Better overall HVAC operation

Bigger Isn’t Always Better When Choosing an Air Conditioner

A common misconception is that installing a larger AC system will automatically make a home more comfortable.

Bigger isn’t necessarily better when it comes to air conditioning.

This is particularly important in McAllen, San Juan, Pharr, Mission, Edinburg, Alamo, and other Rio Grande Valley communities, where controlling both temperature and indoor humidity is important for comfort.

If an existing air conditioner isn’t keeping the home comfortable, increasing the tonnage isn’t automatically the solution.

The real problem could involve:

• Improper AC sizing
• Restricted airflow
• Undersized or poorly designed ductwork
• Insulation problems
• Excessive air leakage
• High indoor humidity
• Equipment performance issues

Before recommending a larger system, it makes sense to determine why the existing HVAC system isn’t performing properly.

Professional AC Installation Starts Before the Equipment Arrives

Proper HVAC design starts before a new condenser or air handler is installed.

At JL Cooling & Heating LLC, we believe homeowners should understand why a particular AC system is being recommended for their home.

A Manual J load calculation helps determine the home’s heating and cooling requirements. Manual S equipment selection then helps determine which HVAC system can meet those requirements under our South Texas operating conditions.

Instead of simply replacing the old system with the same tonnage, this approach provides information that can be used to make a more informed equipment selection.

Manual J Load Calculations & AC Installation in the Rio Grande Valley

If you’re considering an AC replacement, new air conditioning system, or HVAC installation in the Rio Grande Valley, proper sizing should be part of the conversation.

JL Cooling & Heating LLC provides HVAC services for homeowners in San Juan, McAllen, Pharr, Mission, Edinburg, Alamo, and surrounding South Texas communities.

We believe in evaluating what your home actually needs before recommending new HVAC equipment.

JL Cooling & Heating LLC
We don’t sell what you don’t need.
📞 (956) 569-4838
🌐 jlcandh.com