That .15 or .18 in wc @ 300 fpm does not reflect what will actually be going on in a real installation. Depending on the size system you have, you would need a filter setup with the airflow split between 2 or 3 of those Airscreen 1000 filters to get a face velocity of 300 fpm. In a typical installation with one filter located in a rack on the return end of the furnace, a filter like that is likely to produce a pressure drop >.3 in wc when it is clean and new. Since there is not much surface area to them, they get very restrictive very fast as they get dirty.
Originally posted by monicap
The Airscreen 1000 literature states that it has a Pressure Drop of .15 in w.c. @ 300 fpm. The Honeywell Media air cleaners F200 and F150 have a slightly higher pressure drop of .18.
If pressure drop is crucial, why shouldn't I just go with the Airscreen product?