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Homemade HEPA filter for tiny, dusty apartment. This is the result of 18” furnace HEPA filter + Box fan on about 10 hours per day for 1 month. Total price <$40; 6
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Bypass HEPA Filter - Furnace and Air Conditioner repair in Olathe, Overland Park, Lenexa, Shawnee, and Gardner
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Goodman Hepa Media Filter for Model DMH900: Replacement Furnace Filters: Amazon.com: Tools & Home Improvement
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