20_1/2x25_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack post harvest Support large filters and heavy

Support large filters and heavy reflectors without compromising your growth area—the Hercules means center support poles are superfluous

12''x40'' Funk Filter Carbon Air Filter

Use in conjunction with regular nutrient program throughout the vegetative stage and first three weeks of the bloom stage

Carefully processed and sifted to make it easy to work with

and mushrooms

20_1/2x25_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack post harvest Support large filters and heavyNordic Pure Custom MERV 10 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