17x25x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Light Movers Hangers TDS readings are performed by

TDS readings are performed by an amperometric graphite electrode that resists oxidation

a kelp boost

stable power for high intensity & quality spectrum

1 x Ethernet Cable

17x25x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Light Movers Hangers TDS readings are performed byNordic 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