Offering efficiencies that exceed ASHRAE 90.1 standards, 30-Ton Envision® is suited for large zones in commercial and institutional applications. Constructed of heavy gauge galvanized steel, system features VFD with LCD, two Danfoss scroll compressors, permanently lubricated blower motor with thermal overload protection, and Aurora microprocessor controls. With copper inner tube and steel outer tube, coaxial heat exchangers allow for max heat transfer at normal and low water flow rates.