23_1/2x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors Rigorously engineered

Rigorously engineered

The micelle measures between 1-4 nano meters and does all the work

No Removable Driver Box

The efficiency of all grafting is shown in the take and speed of operation

Easy to install and operate

23_1/2x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors Rigorously engineeredNordic 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