On/off thermostats

An on / off thermostat only switches a boiler on and off. When the thermostat makes a heat request at the central heating boiler, it immediately emits 100% gas. As soon as the desired room temperature has been reached, the boiler switches itself off again. On / off thermostats have the advantage that on / off thermostats on both on / off central heating boilers and modulating boilers fit.