1. Does it have a timer & thermostat? START
Is it a combi boiler? No
Does it have a timer & thermostat?
START
Yes
Central heating timer & thermostat to be installed with boiler
Does it have a timer & thermostat? No
Yes
Yes No
Controls meet first requirements
System satisfactory
No additional components required
Central heating timer & thermostat to be installed with boiler
Weather compensation
Select one of the following to be installed alongside the combi boiler
Flue gas heat recovery
Load compensation
Smart heating controls