20_1/2x25_1/2x1 Exact MERV 7 AC Furnace Filters 6 Pack shoe-cover Growth Science® Base B and

Growth Science® Base B and Growth Science® Base A should be used together for best results

Our formula is chelated to allow for immediate availability to plants

teamed up to blend the perfect ratios of coco coir pith

Wall Mount for up to 24" fan

can adjust fan speeds in response to temperatures and humidity

20_1/2x25_1/2x1 Exact MERV 7 AC Furnace Filters 6 Pack shoe-cover Growth Science® Base B andNordic 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