12_3/4x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack PPE It is an environment

It is an environment

pH and EC/TDS readings are automatically temperature compensated

or glued to any surface

32 ft power cord

0 mils thick

12_3/4x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack PPE It is an environmentNordic Pure Custom MERV 10 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