16_1/4x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Automatically Program any Growth Stage

Automatically Program any Growth Stage or Spectrum Mix

and operates at a rapid pace

Impermeable fabric and seams pass ASTM F1670 & F1671 tests for protection against blood

a 6 HP (220 V) leaf collector suction system and the unique triple-bag kief filtration and trim collection system

letting you start all over again—with the same tray

16_1/4x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Automatically Program any Growth StageNordic Pure Custom MERV 14 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