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Why does nobody talk about furnace filters with MERV ratings above 11?
I always bought the cheap fiberglass ones from Home Depot in Calgary until my HVAC guy showed me the dust buildup on the blower wheel last spring. Switched to a MERV 13 and the air quality difference in my bungalow is night and day. Anyone else notice their vents actually stay clean with a higher rated filter, or is this overkill for a forced air setup?
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gray_morgan13d ago
Those high MERV ratings choke airflow and your furnace has to work way harder than it should. Most HVAC folks will tell you the cheap blue ones are fine if you just swap them monthly. All that extra filtration is just money out the window for a bungalow.
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