The heart of a car is definitely the engine. Just like a human heart, the goal of an engine is to pump air. Fresh, clean air comes in, flows through the intake and cylinder heads, and then gets ...

HEPA air filters promise to take nasty things out of the air, removing cigarette smoke, pollen and other irritants. How do they do this? Appliance Science looks at how HEPA air filters work, and how ...

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 ...