SMART Filtered-Air Recirculation System The SMART Filtered-Air Recirculation System by Next Generation Farming provides a solution to reduce the emission of potential nuisance odors and airborne microbes associated with cannabis cultivation via a closed-loop, underground, dehumidifying, air-filtration system. This system circulates air throughout the greenhouse through an air intake on one end, and passes air into a network high-density polyethylene (HDPE) tubing installed in the earth underneath the greenhouse. The underground tubing acts as a low-energy dehumidifier by exchanging heat from the air into the ground and causing condensation. The tubing may be coated with an anti-microbial epoxy which prevents growth of algae and bacteria. The dehumidified air is finally passed through a carbon filter to remove airborne terpenes, spores, and other particles before the treated air is re-intaken at the other end of the greenhouse. This add-on system is recommended for any installation where environmental odors are a concern, in high-humidity locations, or when greenhouses are at special risk to airborne spores and demand active air filtration. Specifications Specifications Particle Filter Size 0.3 microns Carbon Filter Lifetime 6 months Typical Air Flow 350 CFM1 Tube Network Length 900 feet 1 Pump CFM requirements may vary depending on the climate of installation. Name First Last Email QuantitiyHow did you hear about us? This iframe contains the logic required to handle Ajax powered Gravity Forms.