The Salus RT520 Hard Wired Boiler Plus Compliant Thermostat is the latest addition to Salus range of thermostat heating controls. With a new on-board load compensation feature, it offers the most cost effective fully compliant Boiler Plus solution on the market providing the homeowner with optimum efficiency and maximum heating control comfort. It features a larger more intuitive LCD display and a handy new suite of additional operational and efficiency functions.