20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack Water Pumps & Irrigation Supplies Less competition for nutrients in

Less competition for nutrients in the soil allows plants to develop healthier root systems with increased biomass

It is highly efficent and accurate due to its advanced microprocessor technology

• Made in Germany and engineered in a ISO 9001 certified facility

Some are best for mother rooms

They do not exist in the general lighting industry

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack Water Pumps & Irrigation Supplies Less competition for nutrients inImportant 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,