9x27x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack hydro-systems Length: 25'

Length: 25'

Digital Calibration (push button) to any point within the meter's range

For new plantings and container plants

commercial indoor facilities with rolling bench layouts

ZeroTol HC has been formulated for use in hemp & cannabis production

9x27x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack hydro-systems Length: 25'Nordic 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