17x27x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses Diffused Technology to prevent shadowing

Diffused Technology to prevent shadowing

Allows evaporative cooling in hot climates & provides thermal insulation in cold climates

-case shell made of polypropylene (PP) - ABS plastic

aerating the soil to allow easier root growth and improve water retention

Because Trimbag is blade-free

17x27x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses Diffused Technology to prevent shadowingNordic 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