That study did not include the risk of reaersolization (blow back up in the air) of dried respiratory aerosols that will have settled on the ground. You will give a little in efficiency to gain safety. http://poppendieck.com/IAQ/COVID19%20FAQ.html
As discussed here, it decreases performance. The 1″ filters are fine – although you would get even better performance with 2″ filters. Just not 1″ filters doubled up.
Put on your N100 elastomeric respirator (more comfortable than N95). Does not have to be N100 – just better masks work…better. Carefully, pick up the Corsi/Rosenthal box and gently take it outside. Carefully cut the filters apart, gently peel it… Read More »How do I dispose of the filters?
Always refer to the manufacturer’s specifications. But a general rule of thumb is: If used during smoke season, 3 months. If during regular usage, 6 month. Additional details on MERV 13-A filters which for sure will are the ones that… Read More »How long do the filters last?
You can build one of these for just under $100, and it will help significantly remove respiratory aerosols that contain SARS-COV-2 from the air. We recommend at least 2 of them in a normal sized classroom. $200. Keep in mind… Read More »How expensive is the Corsi/Rosenthal Box?
A simple question, but can be a complicated answer. Try not to place next to a wall if possible. You want air flow. If you know who’s infected, next to them (typically placement in a patient’s hospital room). If you… Read More »Where should it/they be placed in the room?