A big factor in good indoor air quality is installing the right air filter. That simple component of your HVAC system plays a far bigger role in a home's comfort and health than many people realize.

Filters were originally conceived to protect heating and cooling equipment, for example to prevent large particles from clogging the air passages of coils. The old, familiar fiberglass filters do a ...

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 ...

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We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan is a writer who covers air and water quality and ...

Becca Lewis is home maintenance writer who aims to foster confidence in and inspire DIY enthusiasts at all skill levels. Becca attended Southern Connecticut State University, where she studied ...

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Use this mainly as a quick gut check, not a precise test. “The two‑minute light test is a good go or no‑go check,” says Kerr, ...