20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack LUXX 200W BAR 208-277V How do we know

How do we know

the Autopilot Cooling Thermostat will cut power to the cooling device

Ceramic metal halide 1000W lamps from Nanolux are the first of its kind which actually work

Plug sold separately

Rounding out the system is the DE1000Zh (Enclosed) Reflector and a premium European-made DE lamp with rated PAR output of 2100 µmol/s

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack LUXX 200W BAR 208-277V How do we knowImportant 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,