I buy the blue fiber glass air conditioner vent filters they usual come 4 in a pack for about $2.00. However, in order to save time and money every four months, instead of changing them and throwing them away I vacuum them...
Indoor air quality can be worse than that of outdoor air. Problems can arise from moisture, Insects, pets, appliances, radon, materials used in household products and furnishings, smoke and other sources.
The purpose of a home ventilation system is to maintain a
healthy living environment by supplying fresh air to your
home while at the same time removing stale and polluted air.
Home ventilation also helps to maintain proper humidity
levels of 30 to 50 percent.