20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 12 Pleated Plus Carbon 1 Pack 9 CFM The Max-Fan® is the first

The Max-Fan® is the first fan that has been developed with a Computational Fluid Dynamics (CFD) program

Sunshine #4 Natural & Organic is recommended where high air capacity and fast drainage are needed: during winter months

PHOTOBIO•V fixtures and tailored spectra have proven themselves worldwide in everything from heavily automated massive vertical farms down to single rack installations

Flowering Footprint 2'X2

The blade is composed of durable D2 hardened steel and the sharp cross-cutting action improves efficiency

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 12 Pleated Plus Carbon 1 Pack 9 CFM The Max-Fan® is the firstImportant 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,