20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 1 Pack -power-&-lamp-cords Mix 1-2ml per gallon of

Mix 1-2ml per gallon of water in a weekly mix

What warranty does the HLG BlackBird come with

Ships worldwid

Designed for small enclosures

Spray every 2-3 days until the problem is under control

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 1 Pack -power-&-lamp-cords Mix 1-2ml per gallon ofImportant 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,