20x22_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack Travel Bags & Backpacks Programming features two thermal trigger

Programming features two thermal trigger modes and four speed control options

Watch videos of the Trimbag in action here

Repeat releases periodically throughout the growing season

Rockwool or have hard water where less calcium is needed

E1: temperature is too low

20x22_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack Travel Bags & Backpacks Programming features two thermal triggerNordic 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.