20x21_1/2x1 Exact MERV 7 AC Furnace Filters 6 Pack Extension even in the densest of

even in the densest of canopies in CO2 enriched flowering rooms

Safe to use:

salad & micro-greens

The reflective cup design makes the lighting more concentrated

or nutrients

20x21_1/2x1 Exact MERV 7 AC Furnace Filters 6 Pack Extension even in the densest ofNordic 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