Reply To: Gas Combi Boiler how to reduce cost August 18, 2022 at 1:14 pm #194607 kezoParticipantI have my combi set at Water 50 and heating 55.I have recently somdproofed the lounge and replaced the fire with a hole in wall electric fire with built in projector soley for the flame effect. However I’m kicking my self I dindn’t fit a log burner.