Reply To: Gas Combi Boiler how to reduce cost August 20, 2022 at 6:12 pm #194823 kezoParticipantPhaedra wrote:My lowest gas usage was .5 meter units last week as I had a shower at my sons and used his electricAk him if we can all come round 🙂My heating is off at the moment but do fire up water to have a shower.