20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 15 Plus Carbon 2 Pack Extension The new housing is compatible

The new housing is compatible with lanyards to prevent losing or dropping

Optimal ratios of nitrogen and phosphorus promote increased root development

The HI1285-5 is designed for use with Hanna's HI9813-5

An attached respirator hood combined with secure

When selecting the best equipment for your greenhouse

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 15 Plus Carbon 2 Pack Extension The new housing is compatibleImportant 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,