18x22x1 MERV 13 AC Furnace Filters 12 Pack harvest-solutions Preservatives have been added to

Preservatives have been added to the medium to reduce the possibility of mold

Use in conjunction with a fertilizer program

Limiting exposure to sunlight and intense heat will help prolong the shelf life

Max Relay Amperage: 25A

Emergency shut-off valve provides fail-safe overflow protection

18x22x1 MERV 13 AC Furnace Filters 12 Pack harvest-solutions Preservatives have been added toNordic Pure MERV 13 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, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200