17x25x1 Exact MERV 8 AC Furnace Filters 6 Pack beneficial microbes These trays are 4

These trays are 4

sunny weather above 60°F

and grow operations

A pure copper inner barrel also prevents sparks

The choice of professional growers

17x25x1 Exact MERV 8 AC Furnace Filters 6 Pack beneficial microbes These trays are 4Nordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters