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and long lasting
It allows you to track your humidity level at all times with its LED display
Produces more PAR per watt than standard Metal Halide
Coverage - Veg 3' x 3'
Water level indicator
6x20x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Led and long lastingNordic 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