20x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack soil nutruient Foldable design

Foldable design

Compact touch screen controller can connect to an unlimited number of SolarSystem 1100

20Drain diameter (punched): 0

●【Commercial LED Grow Light】It can work on both 120VAC and 240VAC and 277VAC

hanging hardware

20x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack soil nutruient Foldable designNordic 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