Running your furnace, central air, or heat pump probably constitutes a big part of your utility bill. But it’s a small, often inexpensive part—the air filter—that keeps these heating and cooling ...

Gas and diesel engines still power most vehicles and look poised to be with us for some time to come, even if their dominance is waning. Any engine that develops its power from burning fuel depends on ...

Your car’s cabin air filter helps to filter the air that enters your vehicle through the heating and air conditioning system. Things like dirt, dust, pollen and other airborne debris get trapped in ...

When you shop through retailer links on our site, we may earn affiliate commissions. 100% of the fees we collect are used to support our nonprofit mission. Learn more. In our tests, we gauge how well ...

A dirty air filter won’t allow your engine to “breathe” as freely as it should, reducing the performance of your car. Although mileage and sometimes time intervals for changing your engine’s air ...

Air filters play an essential role in the overall air quality in your home, and help improve the efficiency of heating and cooling systems. They trap dust, pet dander, pollen, and other airborne ...

The forced-air heating and cooling systems that keep our homes comfortable year-round require very little maintenance. In most cases, all you must do to keep the equipment operating at peak efficiency ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan ...