SteamyTea

So true. When I get time I may look at the cost differences between energy types, I am a bit tied up this weekend, but have a good 11 hours driving time to think about it.

Going up country tomorrow, so almost passing your place if you are about.

Not sure I want to play the biscuit game, I am still scared from a Public School education.

Don't forget climate change.

Why not an inline heater, with a manual change over valves. (I thought you had one in the past) Can you get it analysed to find out what is in it. We have a lazer spectroscope thinking at work, not sure if it does all chemicals or just metals, never tried it out.

Try being in a World Heritage Area. Not even allowed to replace my garden shed without permission.

That is more down to education than design, though I suspect that some places do have undersized storage heaters. My totally dumb, 1987 vintage, storage heaters work fine. Took about 10 minuted to work out that there are two dials (and a thermo-electric flap) that control them. If people are turning on supplementary heating (apart from weather extremes), then they need telling how a storage heater works. But I do agree, that retrofitting A2AHPs in those dwellings would be a good move.

A rotationally moulded bit of polyethylene is cheaper. Why they make canoes out of it.

Mine was at Dorset Institute of Higher Education in the early 1980s, my mind was often on other things back then, but it did explain the design of the hydraulic ram clamps we made, and why, on old steel structures you often see a neatly drilled hole at the end of a jagged crack.

I seem to remember, from college, not the 1950s, that the surround was reinforced with mild steel that fails differently below 273K.

As it changes phase between liquid and solid, it will change volume. I am not sure by how much. (water is strange when it crystallises and between 273 to 277K)

Could it be differential expansion/contraction if different materials over time? Some materials age and become more brittle.

It is a bit odd that not all local authorities have CIL. Some have S106 still, and others nothing. I have the same grievance with single yellow line parking restrictions, they need to be the same nationally, double yellows are, and it is not as if the speed limit signs that say 60 MPH are 60 in some LAs, 70 in others and 40 in the next country. All a (expletive deleted)ing nonsense having 'local rules' on taxation.

More than that it likes stability and some certainty in the markets. Something that all governments (UK) in the last 15 years have failed to deliver.

The requirement to supply heat 99.6% of the time could be lowered to say 80% for retrofits. Then explain that resistance heaters pay be requires few days a year.