SteamyTea

Bit out of date https://www.carbonfootprint.com/docs/2018_8_electricity_factors_august_2018_-_online_sources.pdf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

Not even that. Small ASHPs are reasonably priced, a 30 kW one isn't. In some ways, people that consider swapping should do some research they should start with a basic energy course. I tried to get funding for one a decade ago, was told there was no interest because it had numbers in it.

Air tightness can be looked at in isolation. Where your insulation is, and what type it is, also has to be taken into account, as does humidity control. So it is not a simple case of just filling the gaps on the inside, it is why houses have breathable, but wind tight wrappings and vapour control membranes.

Yes, not sure how to get that message across, maybe a pointer to Zoot's thread, can that be retitled 'How to make your ASHP fail'.

I think ICE shows the basic manufacturing energy/carbon costs and the delivered costs on many of the products. Generally, transport is a very low cost, though a very visible one. Also, we pull down very few houses, I think a house built today will still be about, on average, in 500 years (read it somewhere, years ago)

My first thoughts, keep it on all the time, except when it is DHWing. As a general aside, all this nonsense about kWh/year is of little use. What is needed is 2 metrics, the power to keep the place warm at different temperature differences, so: kW/K And the power at different CoPs, so: kW/K @ x CoP