13_1/4x13_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Lighting A product so incredible that

A product so incredible that it couldn't be developed intentionally but had to be discovered accidentally

you can run a top watering system that is virtually clog-free

Get more ballast for your buck with the SG ballast

1" Growing Medium

The light controller is backed by a hassle free 3 year warranty

13_1/4x13_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Lighting A product so incredible thatNordic 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