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 ...

The 30/30® is a high-efficiency panel filter designed as a strong, value-added upgrade from ordinary MERV 8s, said the company. It has a very low initial resistance and a low maintained resistance to ...

It’s time for spring cleaning. That includes making sure that you’re A/C unit is ready for those hot summer days. Choosing the right filter can be confusing … Furnace filters do keep out big particles ...

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 ...