Some duct-cleaning companies clean heating and cooling equipment (condenser coils, fan blades, etc.) as part of a comprehensive duct cleaning, and some charge less if you skip this step. Your heating and air-conditioning contractor may do this for you, but don’t assume these services are part of regular maintenance; be sure to ask explicitly.
Check and Change or Upgrade Your Air Filter
Frequently changing air filters is the best way to keep dust, allergens, and other particles out of your home. With a newly installed system, or a system in a home you’ve just moved into, check your filter monthly to determine how quickly it gets dirty at different times of the year. You will probably need to replace it two or three times during both the cooling and heating seasons.
Clean Components of Your Heating and Cooling Equipment
In the CMHC duct-cleaning study, researchers found that when duct cleaners also cleaned the blower fan blades, there was a small reduction in airborne particles. Cleaning the blower fan might also slightly improve your system’s energy efficiency.
The same holds true for the evaporator coils inside your home’s cooling system. Evaporator coils cause condensation, dehumidifying the air before it circulates through your home. Condensed moisture can cause dust and other particles to stick to and build up on the coils. Also, cleaning the collector pan (and the drain spout in the pan) beneath the coils ensures that dirt doesn’t build up and get drawn into the system. It also prevents water, which can cause mold problems, from building up on and beneath the coils.
Steps You Can Take
EPA recommends that if you have a fuel burning furnace, stove, or fireplace, they be inspected for proper functioning and serviced before each heating season to protect against carbon monoxide poisoning. Some research also suggests that cleaning dirty cooling coils, fans and heat exchangers can improve the efficiency of heating and cooling systems.
Inspect the condition of the air filter
Find out when your furnace blower fan was last cleaned
Check to see when the AC Coils were last cleaned
Locate documents on when the air ducts were last cleaned