15-25 Ton Analog Economizer, Volts: 24, Hertz:50/60, Airflow:Horizontal, The Solid State Economizer System Provides an Economical Method of Providing Cooling Air By Incorporating Outdoor Air in the First Stage of Cooling in HVAC Systems, Mounting Dimensions:47-5/8"H X 28-3/4"W, Overall Dimensions:48"H X 45-1/4"W X 25"D, Weight:155 Lbs, Includes: Filters, Screens, Made In The USA, In Manufacturer Box. (Alt RXRDNFCM3)