Box Fan Hepa Filter Effectiveness

20 by 20 by 1 merv 13 furnace filter.

Box fan hepa filter effectiveness. 0 01 micron 10 nanometers and above. Hepa air purifier aeramax 300 set at 2 feet from particle counter. For some of us allergens are our worst enemy the fresh pollen of spring fall foliage and of course the ever present dust. Merv 13 box fan set up at 2 feet from particle counter.

But here s a gut check. This article is based on the 3m merv 12 20 x 20 pleated filter and the web absorber cut to fit 20 x 25 filter. Recently we ve heard reports of people making a diy air purifier by taping an hvac furnace filter to a box fan so we tried it and tested it. There will be a little arrow on the filter showing which way the air should flow.

People run unprotected fans we just call them fans all the time and it doesn t seem to cause much harm. I think there s a small non zero benefit of that although i haven t seen anyone actually test it. If you want to use pleated filters and higher merv filters the only safe way to do so is have a 5 6 inch media filter installed by a professional. The wirecutter reports that this solution is effective although not to the degree of a dedicated machine.

This graph from puget. Make a hepa air filter out of a box fan and hepa furnace filter. 1 inch pleated filters are 2 3 times more restrictive than fiberglass filters right out of the box and can easily become too restrictive within 30 days of use. Many media outlets have incorrectly stated that hepa.

Point that in the right direction and then tape onto the front of the box fan filter. Further testing needs to be done with higher merv ratings and over longer periods of time. Some have wondered whether we should tape it onto the back of the box fan filter. 20 inch box fan.

But it s not as strong as any of the actual air purifiers we tested. The filter dramatically decreased the amount of black carbon in the room within 30 minutes. The agency says the filter can give you a 90 percent improvement in fine particles. Start off by unpacking the fan and making sure that it works.

Yes hepa will provide more filtration but if cost is an issue than the diy merv 13 box fan is a sensible choice. It falls squarely within the particle size range that hepa filters capture with extraordinary efficiency. As you can see in his video demonstration terrell tapes a 20 by 20 inch whole house air filter merv 13 or higher which sells for 15 over a 20 inch square box fan which you can find for.