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 ...

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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Gives you a better idea of when to replace your filter. Easy to install. Well-designed app. Air Quality Monitor works with major smart thermostat brands. Pricey, though it could save you money in the ...

When you think of your HVAC system, you'll probably think of your furnace and air conditioner first. Your air filter may not get much praise, but it's just as important as either of those juggernauts ...