11 3/8x11 3/8x1 Exact MERV 14 AC Furnace Filters 12 Pack ventilation/air-conditioning Effective between 55°-90° F

Effective between 55°-90° F

RPM is adjustable from 6 RPM (2 ft/min) to 10 RPM (4 ft/min)

When Milky Spore is introduced into the soil

Each system features dual-ball bearing fans rated at 67

11 3/8x11 3/8x1 Exact MERV 14 AC Furnace Filters 12 Pack ventilation/air-conditioning Effective between 55°-90° FNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.