23_1/2x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors Controls air conditioner or exhaust

Controls air conditioner or exhaust fan

for both organic and conventional growers

Ed Rosenthal’s Zero Tolerance is the original botanical pesticide

Easy to install and operate

23_1/2x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors Controls air conditioner or exhaustNordic Pure Custom MERV 12 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