If you’re seeking indoor relief from outdoor allergens, a new filter for your heat and air system may be needed. “Once you ...

A new low-cost DIY box filter is "highly effective" in clearing the air of hazardous indoor pollutants, according to a study.

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 ...