15x17x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Monitors & Timers the AS35 complements non-forced air

the AS35 complements non-forced air heating sources and other specialty heating systems

This product is specially formulated to work best on Tulip

to provide more root space to thrive in

ISO 9002 Certified

which is highly effective as a slow-release fertilizer used to improve the mineral content of soil and other growing media

15x17x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Monitors & Timers the AS35 complements non-forced airNordic 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