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How Heating and Air Conditioning Works

The more you understand about your heating and air system, the more confident you’ll feel about your decisions regarding home comfort! There are many products that can benefit the comfort and health of your home, and understanding how your system works is the first important step. We’re a Chattanooga heating and air conditioning company dedicated to providing our customers with the finest in indoor comfort solutions and services.

Read below for a rough overview of a typical heating and air system, and don’t hesitate to call us at (423) 894-3723 if you have any questions!

Air Conditioning

A home cooling system is what we simply can’t live without during a hot and humid Tennessee summer! Here is how home air conditioning works:

1) The thermostat registers inside air is too warm, and signals the air conditioner (image three) located outside the home to turn on. The air conditioner begins compressing a gas called refrigerant. Compressing the gas actually condenses it to a liquid, and dissipates heat energy into the outside air.

2) The chilled liquid is then pumped inside to the indoor coil. The indoor coil is typically called an evaporator coil (image four) and sits on top of the furnace. It is a series of metal tubing contained in a metal enclosure.

3) The fan motor (image one) powers on, and pulls air from the return air duct(s) in your home. The warm air is first filtered (image two) and forced through the coil where heat energy is absorbed by the chilled coil. This cools the air before it is distributed back into the home via ductwork. Water condensates on the coil which also provides a small level of de-humidification.

Heating with a Gas Furnace

Here are the basic things that happen when heating your home during a chilly Tennessee winter season:

1) The thermostat registers that indoor air is too cold, and signals the furnace (number one) to power on. A flame ignites inside the furnace and heats a metal, vented object called a heat exchanger. The Carrier Infinity® series furnace features a fully modulating flame that can adjust in one percent increments to heat based on demand for the greatest efficiency.

2) The fan motor inside the furnace powers up, and begins pulling air from the home via the return air duct(s). The air pulled from the home is pulled through a filter (image two) before entering the furnace. A variable speed fan motor operates at whisper quiet levels creating quieter, more efficient comfort.

3) The air is then forced through the heat exchanger where heat energy is transferred to the air before it is distributed back into the home via ductwork.

Heating with a Heat Pump

A heat pump (image three) looks just like an air conditioner. In fact, in warmer weather, they cool your home in the same way an air conditioner does. However, in cold weather they can also provide heat by reversing the cooling process (described above).

Most heat pumps are not designed to heat in frigid weather, however some models can if a gas furnace isn’t possible. Heat pumps can also be joined with a gas furnace to provide hybrid heating for greater heating efficiency.

Ted Fugunt Heating & Air Conditioning
How Heating and Air Conditioning Works

1105 Mackey Ave
Chattanooga, TN 37421
Phone: (423) 894-3723

How an HVAC system works

Carrier HVAC System Chattanooga, TN

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