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How Does Your Air Conditioner Work and What Makes Up Your System

Central Air-Conditioning has three main components a compressor, a condenser, and an evaporator. In most situations the compressor and condenser will be located outside near the home. The evaporator is normally located inside the home and sometimes as part of a furnace.

Fluid arrives at the compressor as a cool, low-pressure gas. The working fluid leaves the compressor as a hot, high pressure gas and flows into the condenser. The metal fins around the unit act like a radiator in a car and helps the heat go away or dissipate more quickly.

As the liquid changes to gas and evaporates it takes the heat from the air around it. The heat in the air is necessary to separate the molecules of the fluid from a liquid to a gas. By the time the fluid leaves the evaporator it’s become a nice cool low pressure gas. Connected to the evaporator is a fan that circulates the air inside the house.

This cycle continues over and over and over until the room reaches the temperature set by the thermostat. The thermostat senses when the temperature has been reached then shuts down the air conditioner. As the room warms back up the thermostat know this as well and kicks back on to cool the area back down to the set temperature.

What is SEER and what should you know about SEER?

SEER stands for Seasonal Energy Efficiency Ratio which determines how well the air-conditioning equipment works. The higher the SEER the more efficient it operates which in turn will lower the cost of your energy bills. SEER ratings can range from as low as 8 to as high as 21. However, there are factors that will adjust the SEER rating if not properly maintained.

Field adjustment SEER, elements that can create a change in the SEER level:

Airflow – Without proper airflow the desired temperature change across the evaporator will not occur. Some reasons for restricted airflow are: ducts that are too small duct layout that restricts airflow, restricted grills, and mismatch of air handler with other equipment.

Charge – Improper refrigerant charge impacts the SEER rating as much as 20% which reduces the performance of the air conditioner. As many as 7 out of 10 systems have improper charge.
Tight Ducts – Duct leaks have three basic effects on the change in the SEER rating. Leaks in the supply ducts create a loss in the system’s total capacity. Leaks in the return ducts bring in unwanted, unconditioned and unfiltered air into the home. Third, the difference in supply leakage and return leakage has a negative effect on energy use creating higher utility bills.

Size – Equipment too big will keep you cool when there is a large cooling demand but will hurt performance by reducing the SEER levels. Oversized equipment normally has shorter run times creating uncomfortable “hot spots” and may leave too much humidity in the air. Comfort problems tend to lead to homeowners lowering the thermostat which increases the energy use and the risk of condensation problems. Ignoring any one of these SEER facts can reduce the performance of your air conditioning system. Contact Avis Heating and Air Conditioning to set up an appointment today by calling
800-974-1003 to make sure most SEER for your money.

Freon –
Your home air conditioning system works the same way as your refrigerators and car a/c, they cool down the air by moving heat from the air itself into a refrigerant gas that is cooled into a liquid or warmed into a gas as needed.
Most people do not realize that Freon is actually a specific brand of refrigerant; air conditioning systems can use many different kinds of refrigerants.

The only time it should be necessary to add more refrigerant to a home central air conditioning system is when a leak develops. You may not be able to determine a leak by sight but you can by listening to how your system works.
If it starts and stops frequently and the air is not cooling this might be caused by a refrigerant leak. Another cause is when there is too little refrigerant, the gas tends to move more quickly and cool too rapidly. You can check the evaporator fans inside the A/C if covered in frost this is another sign of a leak. It takes a HVAC professional to find the leak, fix it, and pump more refrigerant into the equipment and test the levels. So shut the system down and call your certified Avis Heating and Air Conditioning Technician at 800-974-1003.

At AVIS Heating and Air Conditioning, we offer many different payment options: 

You may choose to pay CASH or write a CHECK. We also accept the following major CREDIT CARDS:


Another option you may wish to consider is to FINANCE your purchase.

We provide several financing options with Wells Fargo Financing.  Our AVIS technician will bring the paperwork to your home and assist you in completing the finance application. You never have to leave your home. When the application is complete, we will handle the submission to the bank.