20x22x1 Pleated MERV 12 Plus Carbon AC Furnace Filters 3 Pack spl_magfan We special order the internal

We special order the internal frame for the half inch furnace filter

Current runs between two electrodes within the canister

if desired

Can be used in all growing stages

14'' x 40'' Charco Filters Plus Activated Carbon Air Filter

20x22x1 Pleated MERV 12 Plus Carbon AC Furnace Filters 3 Pack spl_magfan We special order the internalNordic Pure 20x22x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material