ThermostatHave you ever wondered why we use air filters in our indoor heating and air conditioning units and why that little light starts flashing on our thermostat saying “replace air filter”?

We use indoor air filters to improve indoor air quality. The air filter aids in the removal of particulate matter, which promotes a healthier environment. Some common types of indoor particulate matters the air filter removes are dust, smoke, animal dander, pollen, tobacco smoke, dust mites, mold and bacteria.

Another use of an indoor air filter is to keep heating and air conditioning equipment clean so it will heat and cool properly and efficiently. A dirty air filter becomes more restrictive as dirt and dust accumulate on it. The furnace blower has to work harder and harder to pull air through the filter. The extra energy required to pull air through the filter causes the blower motor to use more energy and the consumer to pay higher electric bills and eventually costly repairs to the heating and air conditioning equipment.

So when the “replace air filter” light starts flashing, it’s time to replace your air filter. Check back later for tips on purchasing the proper air filter for your unit!