20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 2 Pack pots "The 0-day PHI is a

"The 0-day PHI is a game changer for our berry operation

They are CE and RoHS certified

The fungus creates a symbiotic relationship with the plant: Breathing in oxygen released by the plant and releasing carbon dioxide (released 24 hours a day through the breather patch on the bag) creating a natural self-sustained inexpensive CO2 generator

square cargos

Mounted on the MagFan wall fan with a fan cover

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 2 Pack pots "The 0-day PHI is aImportant 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,