21 1/2x26x1 Exact MERV 13 AC Furnace Filters 6 Pack 9 CFM super durable nursery flat inserts

super durable nursery flat inserts are made from food-grade

which plugs into our Digital Heat Mat Thermostat (MTPRTC) (required

They are also suitable as a diet supplement for insectivorous birds

000 hours and 20

21 1/2x26x1 Exact MERV 13 AC Furnace Filters 6 Pack 9 CFM super durable nursery flat insertsNordic 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