10x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Cleaning Products leading to constant issues with

leading to constant issues with pH and nutrient “hotspots

The fan speed can also operate in an optional minimum setting to maintain cooling and ventilation

Minimizes root knots and egg hatching

seedlings and cuttings

CO2 (optional)

10x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Cleaning Products leading to constant issues withNordic 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