Product Description: The RT520RF is the latest addition to SALUS tried and tested RT 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. The wireless RT520RF thermostat includes all the features of the previous RT series with a larger more intuitive LCD display and a handy new suite of additional operational and efficiency functions. Â