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What is a coil?



You may qualify for the energy efficiency tax credit by matching your air conditioner
or heat pump with the correct coil.

What is a coil?

  • The portion of the heat pump or central air conditioning system that functions
    as the heat transfer point for warming or cooling indoor air.
  • A network of tubes filled with refrigerant.
  • A coil located inside the home that takes heat and moisture out of the air as
    liquid refrigerant evaporates.

Match a coil with your air conditioner or heat pump
for better efficiency and comfort

  • The coil must match the system for capacity and efficiency.
  • Particles may partially block the indoor system and decrease efficiency.
  • The wrong size and capacity coil can cause the unit to fail.
  • A failed unit’s closed refrigerant system must be opened again, requiring
    another service call and allowing possible contamination.

Your coil model number should be located on your invoice or sales agreement. If you are
unable to locate your model number, please contact your local independent Armstrong Air dealer.

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