Clean the air in your home and protect your HVAC system with one of these top-performing air filters from CR’s testsThicker filters do their job better and require less frequent replacement, but ...

Replacing your furnace or AC air filter is actually pretty simple to do. I'll guide you through all that you need to know to do the job right.

Just like the air filter on your furnace at home, a vehicle's cabin filter is replaceable for a reason. Over time, the filter will get clogged and dirty simply by doing its job. Swapping in a new ...

Learn more. In our tests, we gauge how well an air filter removes dust, pollen, and smoke from the air, and see how freely air flows through the filter at any fan speed. We also calculate the ...