12x22x1 Exact MERV 7 AC Furnace Filters 6 Pack ventilation the 10 shelfs are made

the 10 shelfs are made of aluminum alloy plate with good thermal conductivity and have 5 independent digital touch heating controls

Perlite is a unique volcanic mineral which expands from four to twenty times its original volume when it is heated

Like all Growstone products

plant-safe chemical with powerful oxidative properties to keep your root zone clean and free of unwanted organisms and buildup

12x22x1 Exact MERV 7 AC Furnace Filters 6 Pack ventilation the 10 shelfs are madeNordic Pure MERV 7 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 and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters