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How Evaporator Coils Increase Efficiency

Evaporator coils are a key player in providing the comfort you and your family experience in your home every day. And understanding the role that evaporator coils play in cooling down your air is key to understanding how they increase the efficiency of your HVAC system.

The condensing unit compresses Freon into a very cold liquid that is then sent through a set of aluminum or copper coils within the evaporator coil.  This occurs at the same time that the blower in the air handler or furnace is absorbing heat from your house through the cooling fins.

As this warm air travels over the evaporator coil, the cold coils extract this heat and the liquid is converted back to a gas. It then cycles back through the system and returns to the outdoor compressor, and the process is repeated. The cool air that is created on the supply side of the coil is distributed through the ducts of your home and cools it off until it reaches the ideal temperature you have set on your thermostat.

There are several different types of evaporator coils; you should consult an HVAC technician to help you select the right type for your home’s needs.

    • A-coils: A common type that is triangularly shaped
    • N-coils: A very popular type due to their high efficiency and small size
    • Slab coils: The least popular of the three, these look like a car’s radiator

You need to match the power of your evaporator coil to the needs of your home so you can get the most out of your heating and cooling equipment. It should match the capacity of your outdoor compressor or be sized slightly larger.

For more information about evaporator coils, contact Wolff Mechanical today. We have proudly served the Phoenix Valley for more than 20 years.