Using HVAC Filters in Coronavirus Masks - GreenBuildingAdvisor
Apr 09, 2020·N95 mask; The author, Allison Bailes, wearing an N95 mask in public. ... Understanding Filter Ratings: MERV, FPR, and MPR. When you want your HVAC system to filter for good indoor air quality, you need to know about the three main filter rating systems. Building Science HVAC Systems and the Spread of Coronavirus.