20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack commercial-lighting-fixtures laying eggs as they feed

laying eggs as they feed

CROP RECOMMENDATION

For Preventative Maintenance – Dilute 1/2 oz

Nordic Pure 14x20x1 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

Ionic PK Boost allows the grower easy control of the extra phosphorus and potassium that can lead to bumper yields

20x20x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack commercial-lighting-fixtures laying eggs as they feedImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter