17x28x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_ps NPK: 20-20-20

NPK: 20-20-20

The CenturionPro® Mini is one of the most sought after machines on the market and packs quite the punch

and increase comfort

Knockbox 3/100 includes:

17x28x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_ps NPK: 20-20-20Nordic Pure Custom MERV 12 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