16_1/4x21_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs devices like fans or pumps

devices like fans or pumps can be controlled based on time rather than Temperature

That means that when properly installed no light will penetrate the ducting and disrupt your plants' lights out schedule

Extremely energy efficient

Environmental Control Integration – Connect via ECM and alarm ports to broader environmental control systems for fully automated grow room management

Dandelion Enterprises (the makers of Tappin' Roots) utilizes a proprietary & chemical free extraction process to preserve the integrity of each ingredient

16_1/4x21_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs devices like fans or pumpsNordic 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