DRAYTON Room Thermostat RTSI 24001 NEWDRAYTON Room Thermostat RTSI 24001 NEW. Dispatched with Royal Mail 1st Class. Description Drayton RTS range of thermostats utilises electronic sensing to offer accurate temperature control. The five different models are available to suit all domestic applications, including frost protection and combi boilers. "Temperature range is 10C to 30C, S. P. S. T. 2(1)A 230 V AC, Double insulated no earth required, Range limiting stops, Surface or conduit box