The Greenstar Comfort+ is part of the Comfort+ control family. This Worcester Bosch product is a 'Key' which simply plugs into the boiler and wakes up the timer function menu on the appliance. Both the heating and hot water can be programmed to come on and off up to three times a day and this can be set differently for each day of the week to fit in with your customers' routine. The control also automatically adjusts to British summer/winter time. The EasyControl thermostat detects when you're home or not and adjusts the heating accordingly to reduce your bills. It also offers individual room control via smart thermostats.