Backup methods and systems for spa system thermal management

A device comprising:

• an outer case for mounting the device to a shell of a spa system comprising the shell and a spa tub supported by the shell;
• a first mains power interface for coupling to a first mains power source to provide power to a heater coupled to cavity disposed between the shell and the spa tub;
• a second mains power interface for coupling to a second mains power source to provide power to a spa pack for the spa system to provide normal operation of the spa system;
• and
• at least one of:
• a visual indication means to display to a user at least one a status of the second mains power interface and a status of the forced air heater;
• and
• an interface supporting communications to a communications network for sending messages relating to at least one of a status of the second mains power interface and a status of the forced air heater to a remote user upon an electronic device also connected to the communications network;
• wherein
• at least one of:
• the first mains power interface comprises a first electrical interface on a side of the device exterior to the shell of the spa system and a second electrical interface on another side of the device;
• and
• the second mains power interface comprises a first electrical interface on a side of the device exterior to the shell of the spa system and a second electrical interface on another side of the device.

A system for freeze protection of a spa system having a spa tub and a shell supporting the spa tub comprising:

• a mains power interface coupled to a controller;
• a heater coupled to the mains power interface and the controller disposed to heat a predetermined portion of the spa system independent of the normal spa fluidic circuit;
• a temperature sensor disposed at a predetermined position within the spa system;
• a drain forming part of the spa system;
• wherein
• the controller when the temperature monitored by the temperature sensor is below a first predetermined threshold enables the heater independent of a state of the normal spa fluidic circuit and
• either:
• the controller when the temperature monitored by the temperature sensor drops below a second predetermined threshold enables the drain independent of a state of the normal spa fluidic circuit and the heater;
• or:
• the drain when the temperature drops below a second predetermined threshold automatically opens independent of any state of the other aspect of the system and the spa system.