22x30x1 MERV 14 AC Furnace Filters 6 Pack Extension Using the heat mat together

Using the heat mat together with our SunPack™ Heat Mat Temperature Controller (item SPTEMP) gives gardeners the best possible control of temperature and humidity

Works best in warm weather (60°F+)

Each Nordic Pure 4” MERV 13 air filter will capture more than 90% of 1

Black Scale (Saissetia oleae)

just wait until the meter displays the value

22x30x1 MERV 14 AC Furnace Filters 6 Pack Extension Using the heat mat togetherNordic 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.