• Honeywell RA89A1074
• Is a 1 Zone Switching Relay with internal transformer. It provides intermediate switching of a line voltage device from a low voltage controller ( Thermostat). Integral transformer provides low voltage power for control circuit.
  RA89A Honeywell Switching Relays can be used for switching one line voltage load.
• F.Y.I. If your buying the last one there is no cover use your old one