SteamyTea

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.

Bit out of date https://www.carbonfootprint.com/docs/2018_8_electricity_factors_august_2018_-_online_sources.pdf

Coal seems to have been replaced with wind now. At 12:18 08/01/2021Coal was supplying 3.1 GW, wind 3.38 GW (6.7% and 7.6% respectively).

or 0.3 kW even

What I would do, and log the internal and external temperatures. Then it is easy to work out properly what is needed. The Range do some small, 400W, fan heaters with temperature and time controls on them. About 10 quid each. https://www.therange.co.uk/diy/heating/daewoo-digital-plugin-heater/#217528

So that will be ~0.3 kW (not kwh, or Kwh, kWH, kW/h)

?

That last post looks like an advert.

A picture of what you want may be useful.

If it was a MCS installation I think he had to do a room by room heat loss calculation. That should have been in the paperwork handed to you when it was completed.

Cause not Just the weather, not a lot else to do in the rain, except hide down a mine. Why we improved the Bolton and Watt engine.

The home of telegraph and wireless.

Two sets of light, why make life complicated.