16x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack veg nutrients Fully sealed

Fully sealed

in combination with its affordability

Since these are optimal conditions

The CMH single lamp fixtures vertical lamp mounting position provides an even light footprint

a 50 cube plastic insert and 50 ready-to-plant Root Riot™ Plant Starter Cubes

16x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack veg nutrients Fully sealedNordic 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