14x22x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses The tightly woven synthetic HEPA

The tightly woven synthetic HEPA fibers in this filter will help prevent mold

60 Hz and 10

For use on any plants

Use SuperCharge in all your hydroponics and soil growing methods

14x22x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses The tightly woven synthetic HEPANordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition