17x26x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack growing-accessories "We run 80 ballasts across

"We run 80 ballasts across two flower rooms and this controller handles everything flawlessly

Durable shelving perfect for growing plants in greenhouse or sun porch

Once applied to a growing medium

Rounding out the system is the DE1000Lh (Open) Reflector and a premium European-made DE lamp with rated PAR output of 1450 µmol/s

17x26x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack growing-accessories "We run 80 ballasts acrossNordic Pure Custom 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 condition