Can you translate? N99 is 99% of particles at what particle size? N100 is 99.97%?
Residential filtering should have a
MERV rating. But MERV rating is based on particle size, not per centage of some unknown size.
For instance I have MERV-11, a 14x14 filter directly behind a whole house positive pressure fan.
Quote:
·Pre-Filters or Final Filters
·Hospital Laboratories
·Better Commercial Buildings
·Superior Residential Buildings
Filters down to 1.0–3.0 micron particle size
|
'Superior Residential'
