20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Dispensary (NOTE: Not compatible with MAC

(NOTE: Not compatible with MAC systems

Starting Pulse (Peak KV) - 4 - 5

Power Factor: >90%

Case Quantity is: 5

20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Dispensary (NOTE: Not compatible with MACNordic Pure Custom MERV 14 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