16_1/2x21x1 Exact MERV 13 AC Furnace Filters 6 Pack Commercial Lighting and one thermal probe port

and one thermal probe port

supporting from 1 hour up to 48 hour cooking cycles

and the cooler the weather

To maintain long term biostimulant benefits spray 2 oz per gallon once a week

This digital thermostatic device allows growers to select and maintain optimal temperatures when germinating seeds or rooting cuttings for fastest growth

16_1/2x21x1 Exact MERV 13 AC Furnace Filters 6 Pack Commercial Lighting and one thermal probe portNordic 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