The Heatmiser Slimline-E underfloor heating thermostat has been designed specifically with electric under-floor heating in mind. It is compatible with all electric floor systems with a total load of less than 16A. The Heatmiser Slimline-E thermostat allows you to control the system in a variety of ways; Self Learning Preheat - The Slimline Series offer optimum start, a feature where the thermostat calculates the amount of heat up time required. Temperature Hold Facility - The temperature Hold feature standard on all Slimline Series allows for a desired set temperature to be set for a specific duration. After this time has expired, the thermostat will return to its normal program. Key Locking - Key locking is standard on all of the Slimline Series and is an excellent way to reduce tampering with the heating system.