8x18x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_ps Coir supports better aeration and

Coir supports better aeration and drainage

Mini DIN Terminal (middle) allows Direct Connection to Aqua-X Controller

inexpensive Dissolved Oxygen Portable Meter for fast and reliable results

Kills on contact

8x18x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_ps Coir supports better aeration andNordic 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