16x22_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Hand Tools The SAM 400® patented UV-C

The SAM 400® patented UV-C no-ozone laboratory verified technology

and water into a formula that's both effective and environmentally responsible

Internal ruler on optics measures objects from 0

Greenhouses

• Secure and lockable using steel chain link

16x22_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Hand Tools The SAM 400® patented UV-CNordic Pure Custom MERV 8 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