Turned the heating off to try and figure out how much gas we were using for hot water. Appears to be around £2 a day.
This seemed very high, but having looked into it, it is the recirculating hot water system. The loop is around 70m long. From what I can find on line 28mm pipe loses around 50w per meter per hour. Thus it probably costs around 10p per hour in gas to recirculate the hot water. The builder also decided not to insulate the pipe as it is internal. This would maybe have helped a bit, but my reading on-line says that it is an inherently wasteful system to have instant hot water.
I have set the pump to be on in the morning, after school and before bed which is when people are most likely to bath or shower, but that family is giving me a lot of grief for not having it on all the time.
@Mr Punter as requested.
The poor piano has been moved all over the place and is finally where it is supposed to go.
That's me to give some scale. We love the way that the lights reflect off all the glass and the floor at night.
These are basically the finished stairs. They still have lights to go in on the underside of the front edge of the treads.
I doubt that exposed conduit will be cheap. You need a good electrician to bend and thread galvanised conduit and get it looking sharp like that. I am willing to bet that will hardly be any cheaper than conventional wiring in a service void then plasterboard.