21x21x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Nutriants No fillers are used

No fillers are used

and each unit comes with mounting kit

no heavy metals

Inoculation of All New Roots

Automatic Calibration– Automatic calibration at 1382 ppm (mg/L) with a single push of a button

21x21x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Nutriants No fillers are usedNordic 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