21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack lighting-systems/kits it features a resin cased

it features a resin cased circuit board with a sealed bearing fan so it will run cooler than any other ballast and it’s been tested to withstand the extreme atmospheric conditions of virtually any growing environment

208V or 240V

These active ingredients are listed as food grade materials

No additional labor required

21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack lighting-systems/kits it features a resin casedNordic Pure Trane Replacement 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