21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack pest-and-disease-control The butterfly damper blades are

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

fresh citrus scent

The most common household voltage in the United States and Canada is 120V

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 butterfly damper blades areNordic 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