Maybe it's just me but I see a
Powergirl window above the logo and below upper strap. It was a joke, I could really use to lose 50lbs.
I have an overpressure fan running right now into a MERV 11 filter. That's one micron filtration. It's mainly for the dust from the train yard.
Quote:
MERV Ratings|Filter Guide For MERV 8,11 & 13 Filters
[Search domain www.qualityairfilters.com/filter-guide/] https://www.qualityairfilters.com/filter-guide/
MERV ratings range from 1-20. MERV Scale 1-13. MERV Scale 14-20. Most residential home air systems can adequately remove airborne contaminants with a filter rated between MERV 8-13. MERV 14-20 are typically found in hospital and general surgery settings. The higher the MERV rating on a filter, the fewer dust particles and other contaminants can ...
|
MERV 20 would be things like chip fab plant clean rooms.