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There's a great project on This Old House that uses 4x MERV 13 filters to purify the air on your house (even against covid-19 they say)

Question; When it has been running in your house for 6 months, how do you clean it out safely?

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  • It's kind of Half Bakery without knowing how to do this.
    – leeand00
    Commented Jan 23, 2021 at 20:26
  • Most furnace filters are not meant to be cleaned, just replaced.
    – Alaska Man
    Commented Jan 23, 2021 at 20:32
  • I discard those standard filters about every 2 months. Commented Jan 23, 2021 at 20:34
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    Half Bakery and half ? Deli?
    – Alaska Man
    Commented Jan 23, 2021 at 20:36
  • @AlaskaMan halfbakery.com
    – leeand00
    Commented Jan 23, 2021 at 20:38

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You don't. You just remove the fan and build a new 4 filter base. You could remove the bottom and vacuum all the filters to remove some of the dirt but but just replacing would be better. Don't count on this stopping COVID-19.

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  • Actually, Corsi-Rosenthal boxes using MERV-13 *HAVE" been demonstrated to reduce covid-19 particles in the air, and thus to reduce risk. It isn't a guaranteed protection, but it is a significant Improvement.. and yes, the filters should be replaced after three months of use, per their labeling.
    – keshlam
    Commented Oct 30 at 16:42

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