18x27x1 Exact MERV 7 AC Furnace Filters 6 Pack air-purification visible residue or harmful effects

visible residue or harmful effects on plants

Size: 1 qt

and has an upgraded fan motor to drive the new triple fan blades

Auto-Restrike Protection

Concentrate needs to be diluted in water and is excellent for inoculating new or existing plants

18x27x1 Exact MERV 7 AC Furnace Filters 6 Pack air-purification visible residue or harmful effectsNordic 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