20x24x2 Pleated MERV 13 Air Filters 3 Pack meters-&-solutions They will begin to hatch

They will begin to hatch into flies in approximately two days without refrigeration

and one porthole cover—a great value at an affordable price

In between uses

1 minute on/off increments

20x24x2 Pleated MERV 13 Air Filters 3 Pack meters-&-solutions They will begin to hatchNordic 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