17_1/8x26_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack leds Repeat releases every 4 weeks

Repeat releases every 4 weeks through the growing season

or per minute

Used at regular intervals throughout the flowering stage

flower pots

Ships in pieces with pre-wired socket—assembles in minutes

17_1/8x26_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack leds Repeat releases every 4 weeksNordic 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