20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack environmental-controllers The simplicity of this thermostat

The simplicity of this thermostat and its small design make it a useful addition to any grow room

Optional Photo Sensor Available for Sunlight Balancing in Greenhouses

B'Cuzz Bio-NRG Growth-C hydroponic nutrient is suited for all stages of development in conjunction with B'Cuzz Root and Bloom Stimulators as well as Bio-NRG Flavor and Growth-C

one each of Root

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack environmental-controllers The simplicity of this thermostatImportant 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,