8x20x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack Emitters The Odor Stop features a

8x20x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack Emitters The Odor Stop features a The Odor Stop features a variable speed fan to distribute ONA gel up to a maximum airflow of 225 cubic feet per minute (CFM) and easily connects with 4" ports to ventilation systems The included HumTea brewkit will produce 5 gallons of our concentrated HumTea that may be diluted into a maximum of 250 gallons of water for application MERV 12 Plus Carbon air filters are comparable to air filters with the MPR rating of 1500 1900 Nordic Pure 8x20x1 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