Air Conditioning

Close up of air conditioner.

A & L Heating and Air is your #1 HVAC contractor in Maryville, TN, and the surrounding communities. We are the leading company for all of your air conditioning needs. If you need repairs, maintenance, or a brand new system installed, the technicians at A & L Heating and Air are the qualified and professional crew for the job.

We provide the highest quality service for your air conditioner. We also aim to educate and inform our customers. Informed decisions are good decisions. We want you to feel confident we are qualified to perform the service for which you are hiring us.

Our SEER2 (Seasonal Energy Efficiency Ratio 2) energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit’s SEER value and compare it to a newer, more efficient SEER2 unit. You can even customize it to better match your home’s system for a more accurate calculation.

SEER2 Energy Savings Calculator

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This calculator does not guarantee actual costs or savings and is only to be used for educational purposes.

Customize to Your Home

Adjust these settings for a more accurate calculation:




Rate (¢/kWH)


Average Annual Cooling Hours***

Historical Comparison

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** Data from U.S. Energy Information Administration
*** Data from 2002 EPA study

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Air Conditioning Basics

The four main components to your air conditioner are:

Condenser: The condenser is the outside metal unit and where the gas from the compressor is condensed into a liquid. The gas entering the condenser is very hot. The temperature is then lowered, so the gas can convert back to a liquid.

Compressor: The compressor is inside the condenser. It circulates the pressurized refrigerant, to concentrate the heat, and changes the low pressure gas to high pressure.

Evaporator: The evaporator is the part of the system inside the home. In simple language, it absorbs the heat from your home.

Expansion Valve: The expansion valve controls the amount of refrigerant in your system.

All of these pieces are connected by a copper tube that handles refrigerant, creating a closed loop. Heat is collected in the evaporator, sent outside to the condenser. The heat is removed, and the cool air is recirculated back into your home.

AC Facts

An Air Conditioner Doesn’t Create Cool Air.
What happens in the AC process is actually the removal of heat from the air. Your AC uses a chemical called refrigerant to remove heat and transfer it outside. The warm air runs through the lines and coils in your unit and goes from liquid to gas and back again. During this process, the refrigerant removes the heat and transfers it elsewhere so that when the air comes out the other side, it is cool.

Your AC Will Remove Humidity.
Lower humidity helps the overall comfort level in your home by making you feel cooler, even if the temperature is the same.

Your Air Filter Needs To Be Checked And Replaced Every Three To Six Months.
(depending on the manufacturer’s recommendations)
A dirty air filter restricts your air flow, which reduces efficiency, costing you money, and over time can put stress on your unit and could cause a costly repair.

Maintenance, Maintenance, Maintenance.
Your air conditioner needs regular checkups to keep it running in tip-top shape. Having regular annual preventative maintenance will bring your system longer life and fewer breakdowns over all.

The Seasonal Energy Efficiency Ratio (SEER) measures air conditioning and heat pump cooling efficiency, which is calculated by the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. A higher SEER rating means greater energy efficiency.

At A & L Heating and Air, we provide all the services you need to keep your AC running in top-notch shape. Call us at 865-856-8797 for repairs, maintenance, or new-system installation.

Need Air Conditioner Service?

Contact the experts at A & L Heating and Air.

Call us at 865-856-8797!

Air Conditioner Maintenance in Maryville, TN 37801

“Elijah was punctual,knowledgeable,and a asset to your company he was friendly and precise on doing protocol on equipment and respectful of the home” – Patricia R.

Air Conditioner Maintenance in Louisville, TN 37777

“Ronald was so helpful and kind. He went over our options and suggested the best solution. He was great!”

– Kevin N.

Air Conditioner Repair in Greenback, TN 37742

“Excellent same day service with a smile!”

– Nancy D.

Air Conditioner Replacement in Loudon, TN 37774

“Ron did a great job for us!”

– Jim B.

Air Conditioner Repair in Loudon, TN 37774

“Daniel was professional, knowledgeable, personable and I was pleased with his service.”

– Linda H.

Air Conditioner Repair in Maryville, TN 37804

“Very knowledgeable, very thorough, very personable”

– Jeff W.

Air Conditioner Repair in Loudon, TN 37774

“Ron was very good at what he does. This being a very hot day, he kept his cool and continue to fix our air conditioner by 7:00 pm. Thanks to Ron we have air right now until our part comes in. A&L always sends out the best employee, but then it would be hard to tell who is better than the next guy. Thanks A&L for taking care of us on a late Friday afernoon.”

– Jim B.

Air Conditioner Installation in Maryville, TN 37801

“Everyone at A&L went above and beyond, making this experience the best possible. I highly recommend this company for all of your Heating/Air needs. We had our unit completely replaced& Ethan was able to give us step by step on what unit to use and the pros and cons of the many different units. Steven & David did our install in 2 days— record time! They were highly professional & by the end of the install was like family. I have lots of kids so they were all in their bubble the whole time & these guys never missed a beat and treated them with respect. If you want a company that is honest, trustworthy, and diligent in their work ethic I absolutely recommend this company! 20/10 will recommend to anyone needing service.”

– Ashley B.

Air Conditioner Repair in Madisonville, TN 37354

“Very Professional, Polite, Knowledgeable, Explained In Detail About The Repair…So We Could Understand. Over All~Excellent & Will Definitely Use A & L Heating & Air Again! I Highly Recommend This Company To Anyone Needing Heating & AC Service! Very Pleased! 👏🏻”

– Glenda R.

Air Conditioning and Gas Furnace Maintenance in Greenback, TN 37742

“Very knowledgeable, professional, friendly and courteous. He cleaned up after himself as he worked, made suggestions for what maintenance we should have done to improve our system. I highly recommend A & L!!!”

– Sharon F.

A & L Heating and Air proudly provides HVAC service to Alcoa, Friendsville, Greenback, Louisville, Loudon, Lenior City, Madisonville, Maryville, Vonore, Walland, TN, and the surrounding communities. Visit our service area page for more coverage details, call us at 865-856-8797, or request service online today.