17_3/8x35x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs ventilation for at least 2

ventilation for at least 2 to 5 minutes is mandatory to replenish the oxygen supply required by the generator's combustion

Built for the connoisseur who admires the finer things in life

8 x Flora Clip 2

Harvest lettuce

The aluminum construction cleans easily

17_3/8x35x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack grow-system/-trays/-reservoirs ventilation for at least 2Nordic 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