20x20x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack Hydroponics Nordic Pure 10x20x1 MERV 14

Nordic Pure 10x20x1 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home

This press comes equipped with two sets of LED timer and temperature control screens so you can control your top plate and bottom plate simultaneously

A VE115 3cfm (BVVVE280) vacuum pump is recommended for this system

#43905-1) and has complied with all EPA regulations for the continued use of IBA in the product

It has a safety valve and pressure indicator to avoid excessive pressure

20x20x4 (3 5/8) Pleated MERV 7 Air Filters 6 Pack Hydroponics Nordic Pure 10x20x1 MERV 14Important 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