Filters were originally conceived to protect heating and cooling equipment, for example to prevent large particles from clogging the air passages of coils. The old, familiar fiberglass filters do a ...

These filters capture particles like pollen and dust mites but are generally not recommended for those with respiratory issues. MERV 5-8: Ideal for standard residential and commercial settings, these ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan is a writer who covers air and water quality and ...