16x28x1 Exact MERV 8 AC Furnace Filters 6 Pack Tents / Indoor Greenhouses The premium granules expand up

The premium granules expand up to 7 times in volume when hydrated

7 sq ft and 12 ft - 16 sq ft

The electrostatic charge works as a magnet to draw in and trap smaller airborne particles

with very little effort

Bio·Heaven™makes the plant better keep humidity

16x28x1 Exact MERV 8 AC Furnace Filters 6 Pack Tents / Indoor Greenhouses The premium granules expand upNordic 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