SteamyTea

Is it back to normal now? The weather is. 11⁰C and wet.

See if there is an electrical isolator on the immersion. Failing that, turn all the stuff off in the house and see how fast the meter us running. 20 minutes should be about 1 kWh.

Could he the legionella cycle

Hard to tell but is the immersion heater on.

Sounds to me like you have bigger problems. In a well designed and fitted CH system, the recirculation pumps should be virtually silent in operation, and they only use a few watts of power. Start by describing the system. Is it UFH, radiators Type of ASHP Controller Temperatures you are running it at

Who drinks cyder with cheese sandwiches, rather than has marmalade ones.

Rather than try and save money on the brickwork, why not do a Part P electrical testing course and a plumbing one. Or do a stick build.

Get a jug and a stopwatch and check the shower flow rate. Then convert to cubic metres, and multiply by £8 My water costs more than heating it.

And on my very cheap Android phone.

A bit of creative designing and I am sure that drainage areas could be built in with GRP. But I always think of Nigel Pargetter's scream.

God no, would not be allowed down where I am, too close to a World Heritage Site, SSSi and AONB. Anything made after Trevithick improved the steam engine is frowned upon as too modern and untrustworthy. But some GRP cladding, walkways and stone like pillars i made, are still about, after 4o years.

Get some quotes for 250m² timber frame houses. Make sure you have all the important stuff already done i.e services, road access, contamination/bat/newt/ect surveys done. Then keep it simple.

Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

GRP for me, but then I have been playing with it for 45 years now.

What an odd question. First define Low Carbon? Is it the embodied energy, multiplied by the energy carbon intensity Now Improved Performance? Is it the reduced energy use for the building, which may be dependant on the energy source carbon intensity.

Just done my Sunday morning ritual of processing my weather and energy data. Mean temp has been 2.9°C and the mean RH has been 98% Min Temp 0°C and Min RH 29% (probably last night as there is a hard frost this morning) Max Temp 5.2°C and Max RH is 100% (this is where the sensors tops out, so it may have gone higher, as odd as that sounds)

If you really wanted to get posh, and do some interesting programming, link in wind vectoring to it. This could be especially useful for dumping PV generation in during the hours of daylight, for that 'fine tuning' and minimizing imports. Trouble is, with a thermally stable house, not really worth the effort.

While our temperatures have been cold for down here, they are not really cold, hovering between 0°C and 4°C. With our relatively high humidity, this is the worse temperature range for an ASHP. Not cold enough, for long enough, to condense moisture our of the air and lock it up as ice, and not hot enough to reduce the density of the air, and hence the amount of gaseous water in the air is at a maximum. We knew it would happen @joe90's, just seems the last few winters have been exceptionally mild, and it is probably just a statistical fluke (stochastic) event, probably would not have noticed it via the house temperature, just that it happened when the ASHP was trying to heat the water. Possibly, as a solution, in this type of weather, running the DHW cycle at the coldest time i.e. <=0°C, would produce less icing when the ASHP is working at its hardest.

Circulating may even out the temperature (closer to the mean slab temperature) which may cause a bit of cooling in areas that are overly warm, but will only cause a small temperature drop. Much of this is to do with the specific heat capacity of air (needs little energy to raise its temperature, and concrete (or whatever the floor is made from).

There are a number of community projects set up to repair stuff. They usually involve retired men with white beards, and tea. See if you can find a local one. Make an old man happy, and buy him a razor. https://therestartproject.org/parties/ Is Dimplex a rebadged Carrier unit?

Seems events overtook me.

Was it @TerryE

Not really. A lot of it will depend on how well the floor is insulated under the pipes. You may be just heating the ground under the house. Your flow temperatures for the UFH seem high, and your timings seems short, it is more usual to have the UFH on permanently and at a lower temperature. So it may be a mismatch there. Also how much water are you heating, or is it a combi boiler?

I am dubious of the time saving, and performance, benefits of ICF. Just because it looks like Lego, does not mean it goes together easily, or correctly. I never did get to properly make my Lego, or Mecano crane. All the bits where there, along with instructions and pictures.

I quite like the wavey doorway. Think Gaudi had similar in his house.