20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 1 Pack Cleaning Products Nordic Pure 14x20x2 MERV 12

Nordic Pure 14x20x2 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

Rich Humic lab results show 22% humic acid through the alkaline extraction method and 3% humic acid through the acid-insoluble method

Can be used in flood or drip irrigation

you can use all three to sort your work and collect desired plant particles (sold separately)

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 1 Pack Cleaning Products Nordic Pure 14x20x2 MERV 12Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. We also carry 4 7 8 and 5 1 4 inch depth filters,