21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control The program can also set

The program can also set the fans to run continuously or on a timer at custom speeds

fresh citrus scent

The butterfly damper blades are made of aluminum and are equipped with a light spring that folds with minimal airflow

and superior rigidity

You'll also enjoy the sheer speed of setting up the Sunburst—it's plug-and-play

21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control The program can also setNordic Pure Custom 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: Furnace and air condition