13x23x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Controllers It's safe for humans

It's safe for humans

away from direct sunlight and heat sources

The Phantom is also the only ballast on the market designed for vertical or horizontal operation

a 2" vented dome

• Use on medical and hemp

13x23x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Controllers It's safe for humansNordic Pure Custom MERV 13 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