20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs • See a 12-15% reduction

• See a 12-15% reduction in nitrogen use — without sacrificing peak production

Available in pre-cut sizes ranging from 25’ width x 50’ length to 50’ width x 150’ length

which can be continuously fed

works best in warm weather above 60°F

• Stainless steel recovery tank

20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs • See a 12-15% reductionNordic 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