Air Filtration. Shop dust and even welding fume.

Back during COVID and the wildfires out west, I read about a bargain HEPA air filtration hack that could remove viruses and even smoke from the air. I started testing it out in my basement shop, and these many years later, it remains a full-time staple in my shop. It is also good for allergies and home renovation projects. This summer we had some guys rip out a bathroom, including tile demo, and this filter kept the dust out of the house. This filter has many times the flow rate of a typical portable home HEPA filter. If they will change the air in a large room in 15-20 minutes, this will change the air in 3-5 minutes; fast enough to take particles away from where you are working.Note. In general, you should NOT use a filter rated higher than MERV 9 in a standard home furnace. The airflow restriction is too great. Higher MERV filters can be used, but this requires a modified filter housing that can hold filters with much greater surface area. Don't just stick a MERV 13 or MERV 15…

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