Description
20x20x5 (4 3 8) Honeywell Lennox Replacement MERV 12 Air Filters 1 Pack CO2 Nordic Pure 15x20x2 MERV 12 Nordic Pure 15x20x2 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 you’ll have a complete nutrient dosing system