12x14x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Grow Strong Growers use graphic pencil

Growers use graphic pencil

When expanded

When combined with Grow A and B and Bloom B

5 ml to 35 ml per gallon]

8 lbs) Net Weight

12x14x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Grow Strong Growers use graphic pencilNordic 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