17x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutriants Design keeps them both contained

Design keeps them both contained even after separation

Water saving polymers save water and the leaching of nutrients

Features stator-blade fans which can deliver strong airflow from high static-pressure ductwork

Use with undiluted Bluelab pH Up or Down

and foliage

17x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutriants Design keeps them both containedNordic 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