24 1/2x27x1 Trane ReplacementMERV 10 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control all-natural and organic ingredients containing

all-natural and organic ingredients containing an optimum air-to-water ratio for superior growth rates and yields over conventional potting soils

The S-line is a revolutionary series of fans that combine energy efficiency

messy gypsum or insoluble pH raising carbonate required

Enhances phosphate interaction with other plant nutrients

Features dual 120mm PWM-controlled DC fans that are highly efficient in maximizing airflow at lower noise and power levels

24 1/2x27x1 Trane ReplacementMERV 10 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control all-natural and organic ingredients containingNordic Pure 24 1 2x27x1 Trane Replacement MERV 10 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: