13x20x1 Exact MERV 13 AC Furnace Filters 12 Pack Reflective & Greenhouse Films Hydrofarm's Powerhouse convertible ballasts feature

Hydrofarm's Powerhouse convertible ballasts feature engineered transformers made to the exacting American National Standards Institute specifications

for germination and propagation of seedlings

Scientifically engineered to maintain the balance of PAR and coverage area

Can be wired for 120 or 240V

Weight 155 lbs

13x20x1 Exact MERV 13 AC Furnace Filters 12 Pack Reflective & Greenhouse Films Hydrofarm's Powerhouse convertible ballasts featureNordic 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