20x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack dis Each fan uses an easy-to-use

Each fan uses an easy-to-use knob controller that adjusts fan speed for your specific airflow boosting needs

The water saving polymers provide a more consistent water and water soluble feed food source

all Plug-n-Play Necessaries for water/gas operation

LAMP DESCRIPTION: SM

20x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack dis Each fan uses an easy-to-useNordic Pure Custom MERV 7 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