be warned that these put a huge strain on you heating and air system.

I got these because my allergist recommended them. They probably blocked dust but caused many issues. They block much of the air so your vents can’t heat or cool your home as well. They also put a big strain on your system. My HVAC blew out a component because of these filters. The repair man told me it’s better to change you intake filters once a month. Haveing your ducts cleaned every few years can significantly reduce the dust and or allergens from your vents.

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