20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 14 Plus Carbon 2 Pack microbial fertilizer – Light output PPF 1700

– Light output PPF 1700 μmol/s

Two calibration solutions for the price of one

These heavy-duty carpet protectors are ideal for temporary protection in high-traffic areas like hallways

SMS fabric also protects against light liquid splashes and sprays

the Airis 8 delivers a top-tier experience with customizable voltage settings

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 14 Plus Carbon 2 Pack microbial fertilizer – Light output PPF 1700Important 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,