Replace HVAC Air Filter
Replace the furnace/AC air filter to maintain air quality and system efficiency.
DIY Cost
$20
If Ignored
$300
Frequency
Monthly
Difficulty
Easy DIY
Most homeowners can handle this in under an hour with basic tools.
How to do it — step by step
Turn off your HVAC system. Locate the filter slot (usually near the air handler or return air vent). Note the filter size printed on the old filter. Slide out the old filter and slide in the new one with the arrow pointing toward the air handler. Turn the system back on. Set a reminder to replace every 1–3 months depending on your filter type and household pets.
Recommended tools & supplies
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