17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting_accessories flow (flood & drain) systems

flow (flood & drain) systems work by pumping nutrient solution up from a reservoir to a controlled water level tray

blades lock closed with a safety hook when not in use

Litter Beetles (Darkling

26 and 55 Watt lamps simply screw into any standard size light socket

Note: For maximum performance

17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting_accessories flow (flood & drain) systemsNordic Pure Custom MERV 10 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