Hydronic Unit Heater, Heater Type Water Only, Fan Guard Type OSHA, Output @ 200 F Water 18,400 BtuH, Air Flow 500 cfm, Motor HP 16W, Amps 0.8, Inlet/Outlet NPT 3/8", Height 16", Width 18", Depth 7-3/4", Air Flow Direction Horizontal, Coil Type Serpentine, Voltage 115, Hz 60, Phase 1, Max. Operating PSI 75, Max. Operating Temp. 320 Degrees F, Motor Enclosure Totally Enclosed, Mounting Height 8 ft., Standards ETL Certified.WARNING: California ResidentsThis product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.