16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 8 Pleated Plus Carbon 2 Pack Lighting & Electrical Components • Lower life time cost

• Lower life time cost

Kit includes:

Both high and low level limits are user-adjustable to meet local regulations for supplemental CO2 use indoors

Also makes an excellent “All Purpose” plant food

designed specifically for indoor enhanced plant growth and flowering

16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 8 Pleated Plus Carbon 2 Pack Lighting & Electrical Components • Lower life time costImportant 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,