13x21x1 Exact MERV 12 AC Furnace Filters 12 Pack Travel Bags & Backpacks Highly reflective & reinforced for

Highly reflective & reinforced for durability

and enjoy added benefits of mycorrhizae (a beneficial fungi species that promotes root growth and enhances fertilizer uptake)

Application Rates: The square footage below refers to surface area of the standing water

and other indoor growing equipment

13x21x1 Exact MERV 12 AC Furnace Filters 12 Pack Travel Bags & Backpacks Highly reflective & reinforced forNordic Pure MERV 12 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, smoke particles, virus carriers, allergens and other contaminants are removed. MERV 12 furnace filters are comparable to HVAC filters with the rating of MPR 1500 1900. While different