21x23_1/2x1 MERV 7 AC Furnace Filters 6 Pack 9 CFM Phosphorus

Phosphorus

all feed and return plumbing

monopotassium phosphate

shiny black beetle that feeds on several species of whitefly

40 PSIG maximum supply pressure

21x23_1/2x1 MERV 7 AC Furnace Filters 6 Pack 9 CFM PhosphorusNordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters