13x21_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Drying Racks Charging Time – 120 min

Charging Time – 120 min

- For cooling

For those who demand even more performance

the meter automatically accepts and stores the calibration value

This system is characterized for its:

13x21_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Drying Racks Charging Time – 120 minNordic 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