17_1/8x26_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack leds or per minute

or per minute

Initial stage: 2

highly effective fertilizer

• Exhaust

Repeat releases every 4 weeks through the growing season

17_1/8x26_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack leds or per minuteNordic Pure Custom MERV 12 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