24 1/2x27x1 Trane ReplacementMERV 10 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control Features: Low frequency

Features: Low frequency

Possibly the strongest REUSEABLE duct on the market with a cost similar to the leading competitor's regular 3-ply duct

The HI98118 has a very large easy to read LCD display that shows both pH and temperature along with calibration

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

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 Features: Low frequencyNordic 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: