20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 4 Pack Environmental Controllers This increases capacity

This increases capacity

a single application is typically sufficient

The Twister Certified Conveyors work with both the Twister T2 and Twister T4 trimmers

If the float valve stops operating

Make access to your greenhouse simple and convenient with this time saving product

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 4 Pack Environmental Controllers This increases capacityImportant 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,