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HVAC Filter Replacement
House size plus MERV plus occupancy gives replacement interval in days.
Replace every (days)
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- Per year
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- Months between
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FAQ
What MERV should I use? +
MERV 8 to 11 for most homes. MERV 13+ if you have allergies or asthma, but check pressure drop.
Why pets shorten interval? +
Dander and hair load up the filter faster.