Salus iT500BM Internet Thermostat for Combination Boilers Only. This thermostat is part of the Salus range and with pre-assembled and pre-wired included with the control unit this makes it easier to install. Integral ball valves allow for isolation from the primary system. An adjustable blending valve allows you to control the temperature of the water. The anti-vibration bracket will ensure silent operation. This product is suitable for conservatories and room extensions and is suitable for most floor types.