13x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack shoe-cover Drench application is favored for

Drench application is favored for diseases affecting roots

transforming a one-dimensional metal halide lighting system into a complete growing system

They make your job easier by giving your machines a wide range of portability

which removes and collects all debris into a vacuum bag

13x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack shoe-cover Drench application is favored forNordic 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