20x28x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Tubing Compares to traditional 400-watt HPS/MH

Compares to traditional 400-watt HPS/MH while consuming only 200 watts

and aquaponics systems

Bio-complex minerals improve cell wall density for larger

Walnut Husk Fly (Rhagoletis completa)

Commercial/Residential Odor Control – Reduces odor caused by mold

20x28x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Tubing Compares to traditional 400-watt HPS/MHNordic Pure Custom MERV 12 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