16x21x1 MERV 13 AC Furnace Filters 12 Pack Liquid & Weight Measuring The insulated damper uses gravity-fed

The insulated damper uses gravity-fed shutters that close the opening when the whole house fan is not in use

Create nutrient reserves in the plant

Now let your PotPro™ System take care of your plants

5" humidity dome is ideal for rooting large cuttings and/or growing cuttings to large size after rooting

amplifiers

16x21x1 MERV 13 AC Furnace Filters 12 Pack Liquid & Weight Measuring The insulated damper uses gravity-fedNordic 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