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A simple 20 x 20 Box fan with a furnace HEPA filter placed against it (just turn on fan and place filter behind it) will do wonders for your indoor air quality.

A simple 20 x 20 Box fan with a furnace HEPA filter placed against it (just turn on fan and place filter behind it) will do wonders for your indoor air quality. The 3M 2200 Series Filtrete Filters are amazing. You also always want to cook with the Hood Fan going. The particulate that is created during cooking is so small it can pass through the lungs into your blood stream causing havoc.

hazemotes 5y ago
How long do the filters last?
- hourislate 5y ago
  It all depends on how dirty your air is. I typically get about 2-3 months. Ir you're considering it, I would recommend the following fan. https://www.homedepot.com/p/Lasko-20-in-Power-Plus-Box-Fan-B20540/300202629 https://www.homedepot.com/p/Lasko-20-in-Power-Plus-Box-Fan-B... I have 3 running in my home and they haven't been turned off for over 1.5 years, still going strong. The filters I buy at Costco when on sale (3 for $29). This one has been on the fan 24x7 for the last 2 months and is still good for a couple of more. https://imgur.com/JfSjbbg https://imgur.com/JfSjbbg
- ddeck 5y ago
  As another commenter noted, it depends on your air, but a decent HEPA filter (H13/H14 etc.) will last a very long time if you remove the coarse dust first with a prefilter. The prefilter is typically a lot cheaper and is replaced more often. Even some non-woven filter fabric (like that used in vacuum cleaner filters) will dramatically increase the HEPA filter life, is super cheap, and can be washed for reuse. My purifiers use an F8 prefilter and H13 HEPA filter, and the HEPA filter will last about 2 years. Filter class info here: https://www.emw.de/en/filter-campus/filter-classes.html https://www.emw.de/en/filter-campus/filter-classes.html
- pbourke 5y ago
  We run box-fan filters during wildfire season here in the PNW and change them out after the season ends. Last year they were quite gray after all of the fires. We run Honeywell HEPA cleaners year round and bring the box fans out to supplement as needed.
- Tade0 5y ago
  Normally they should last a year, but a solid week of 200ug/m3 is enough to clog one. Speaking from experience.
ipsum2 5y ago
I also do this, but the box fan is so noisy, even on low settings. How do you put up with it? Or maybe I just have a bad model?

hazemotes 5y ago

How long do the filters last?

hourislate 5y ago
It all depends on how dirty your air is. I typically get about 2-3 months. Ir you're considering it, I would recommend the following fan. https://www.homedepot.com/p/Lasko-20-in-Power-Plus-Box-Fan-B20540/300202629 https://www.homedepot.com/p/Lasko-20-in-Power-Plus-Box-Fan-B... I have 3 running in my home and they haven't been turned off for over 1.5 years, still going strong. The filters I buy at Costco when on sale (3 for $29). This one has been on the fan 24x7 for the last 2 months and is still good for a couple of more. https://imgur.com/JfSjbbg https://imgur.com/JfSjbbg
ddeck 5y ago
As another commenter noted, it depends on your air, but a decent HEPA filter (H13/H14 etc.) will last a very long time if you remove the coarse dust first with a prefilter. The prefilter is typically a lot cheaper and is replaced more often. Even some non-woven filter fabric (like that used in vacuum cleaner filters) will dramatically increase the HEPA filter life, is super cheap, and can be washed for reuse. My purifiers use an F8 prefilter and H13 HEPA filter, and the HEPA filter will last about 2 years. Filter class info here: https://www.emw.de/en/filter-campus/filter-classes.html https://www.emw.de/en/filter-campus/filter-classes.html
pbourke 5y ago
We run box-fan filters during wildfire season here in the PNW and change them out after the season ends. Last year they were quite gray after all of the fires. We run Honeywell HEPA cleaners year round and bring the box fans out to supplement as needed.
Tade0 5y ago
Normally they should last a year, but a solid week of 200ug/m3 is enough to clog one. Speaking from experience.

ipsum2 5y ago

I also do this, but the box fan is so noisy, even on low settings. How do you put up with it? Or maybe I just have a bad model?