15x18x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Controller Standard logic CO2 controllers will

Standard logic CO2 controllers will not make these calculations and will continue to inject more and more CO2 into the room until the controller reaches its set point

Can be used as a harvest aid for cotton

and plant types that require high levels of calcium and nitrogen

Place each wrapped seedling into a net pot

• Rapid Bloom Initiation and growth

15x18x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Controller Standard logic CO2 controllers willNordic Pure Custom MERV 8 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