Bask in the heat and glow of your upgraded Clearlight Infrared sauna with an easy-to-install full-spectrum heater. Use the table below to determine which heater you require. If you need assistance determining the heater you require, please reach out on the chat or email us. Installation instructions for the full-spectrum heater. Please note: improper electrical installation of the original sauna may cause the breaker to trip after installing the full spectrum heater upgrade. If this occurs, an electrician may be required to properly reinstall the sauna. 120V 240V Sanctuary 1120V/15 AMP Sanctuary 1120V/20 AMP Sanctuary 2120V/20 AMP Sanctuary 240V/15 AMP Sanctuary 3240V/15 AMP Sanctuary Y240V/20 AMP Sanctuary C240V/20 AMP Sanctuary Retreat Premier IS-1 Premier IS-2 Premier IS-3 Premier IS-C Premier IS-5 Sanctuary Outdoor 2 Sanctuary Outdoor 5