20x23x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack -power-&-lamp-cords Nordic Pure 16x20x4 Plus Carbon

Nordic Pure 16x20x4 Plus Carbon Air Filters MERV 8 are made of a dual material where the MERV rated material has been fused together with a carbon layer

Designed for ventilation applications including HVAC

The mixture is fortified with fossilized kelp and inoculated with endo and ectomycorrhizae

The Pro 650 system raises the PAR bar for the entire horticultural lighting industry

lamp must be operated on low-frequency square wave ballast

20x23x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack -power-&-lamp-cords Nordic Pure 16x20x4 Plus CarbonNordic 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