21x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack water-filtration (x3) Bed Knife Assembly: Box

(x3) Bed Knife Assembly: Box of three knives as required to hot swap one M108S

and quality

Dispose of contents and container as per local regulations

the level of water in the canister rises to expose more uncoated electrode surface

one or two points Temperature Compensation automatic from 0 to 50°C (32 to 122°F) Battery Type/Life CR2032 3V Li-Ion (1 pc

21x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack water-filtration (x3) Bed Knife Assembly: BoxNordic Pure Custom MERV 7 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