15_1/4x15_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films custom-fitted cover that double insulates

custom-fitted cover that double insulates your existing air-cooled hood to prevent the heat your lamp generates from radiating out of the reflector and increasing grow room temperatures

Visible results in 1-3 days

6" diameter by 20" long accommodates most lamp types up to 1000W

preventing the likelihood of an explosion and ensuring total safety of operation

Improved Protections

15_1/4x15_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films custom-fitted cover that double insulatesNordic 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