SteamyTea

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Bit out of date https://www.carbonfootprint.com/docs/2018_8_electricity_factors_august_2018_-_online_sources.pdf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

I have 5 DAB radios, all tuned to the same station. Total outlay less than £120. Works a treat. I have a 6th radio, that I can take into the garden, and one came with my car. For catchup, I use my phone.

Ain't going to happen, that would be more energy coming out than goes in. The price point is an interesting one. We are now about about £500/kW installed, or about £100/m2. That is about £50/m2 cheaper than a Wickes PVC window.

The industry is pretty mature really. Just not been in the public's consciousness until recently. It is a bit like planting a tree, the best time was 20 years ago, the second best time is today.

There are fundamental limits to the technology (~37% for silicon), and in real terms, we are not far off them. HIT is at around 25% and has been for about a decade. Inverters peak at about 95%, so not a lot not be gained there. I once had a conversation with a lady that had a small wind turbine, a 1 kW one. She was asking me what sort of washing machine to get as she was off grid. She never did understand that it would not do her washing, even 'when it was very windy'.

PV now costs less than single glazed windows and frames. There has to be a point where it cannot get any cheaper as the materials will not get any cheaper. As @Bitpipe says, it can be cheaper than a roof covering, fit them and connect them up later if it is a cashflow issue. Does anyone do a payback calculation between different tiles?

There is a minimum distance that PV modules can be from the ridge. Now I know why.

So an old lightbulb's worth. Seem to remember a heated debate over at the other place about low energy lighting taking away the heating element.