12x22x1 Exact MERV 12 AC Furnace Filters 6 Pack chillers-heaters-and-purification When used with a temperature

When used with a temperature controller and tray domes

The ballasat has 99% power factor rating making it highly efficient and it also has open/short circuit protection

This offers the grower a lighter weight option than heavy bags of wet soil

Two pull chains to operate speed and oscillation

Includes two RO membranes (HL22045)

12x22x1 Exact MERV 12 AC Furnace Filters 6 Pack chillers-heaters-and-purification When used with a temperatureNordic Pure MERV 12 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, allergens and other contaminants are removed. MERV 12 furnace filters are comparable to HVAC filters with the rating of MPR 1500 1900. While different