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 ...

Best Window AC Units of 2024: See at Cnet Below we'll outline when to change your AC filter and how to swap it the right way to guarantee your AC unit runs properly and efficiently. For more ...

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 ...