15_1/2x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Extension 5 ml per gallon

5 ml per gallon

The pH controller includes a chemically resistant low voltage dosing pump plus both pH and temperature sensors

• Patented double wall design for cool operation

Dimensions: (with pre-filter)

15_1/2x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Extension 5 ml per gallonNordic Pure Custom MERV 13 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