20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 8 Pleated Plus Carbon 4 Pack Lamps • Necessary for (P) phosphorus

• Necessary for (P) phosphorus uptake

All 25 to 90 GPD membranes will fit in our standard membrane housing

Producing very high levels of PPF output of 816 µmol/s and a Photon Efficacy (fixture efficiency) of 2

entertainment centers

so lamp travel can be any length you wish

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 8 Pleated Plus Carbon 4 Pack Lamps • Necessary for (P) phosphorusImportant 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,