Specifications include, but are not limited to: A. The Contractor shall furnish Single Package Vertical Heat Pumps meeting the size and capacity shown in the specifications. The units shall consist of a chassis, case, and accessory drain pan. B. Units shall be listed by UL, and AHRI and certified as to capacity and efficiency. Unit dimensions shall not exceed 23 1/8 inches wide, 23 1/8 inches deep, and 47 1/4 inches high. Foil backed, 1/2" insulation blanket inside the cabinet reduces sound transmission. C. The heat pump case must adapt/fasten to and be compatible with an existing exterior wall plenum. The exterior wall plenum size will accommodate heat pump 23” wide by 32” high. The existing wall plenum serves as an outdoor air duct with a splitter to separate the outdoor paths and prevent discharge air from being drawn back into the heat pump. D. Unit shall have means of electrical connection listed by Underwriters Laboratories and compatible with the unit's required voltage and ampacity in conformance with National Electrical Code and local codes. 1. Units shall be designed to operate on 208 or 230 volts, 60 Hz, single-phase power on 20 amp circuit.