13x21_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Drying Racks with wattage output from 60

with wattage output from 60 to 610 watts

This system is characterized for its:

For those who demand even more performance

the meter automatically accepts and stores the calibration value

13x21_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Drying Racks with wattage output from 60Nordic Pure Custom MERV 13 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