SteamyTea

@Ronny @ReedRichards Not been following your sub discussion on the AI. Are you saying that when it is turned on, the LWT (Lower Water Temperature) drops lineally with outside temperature (so when -7°C outside, LWT is 34°C, than at 21°C it is at 46°C). Or are you saying that it is the inverse of this? (so when -7° the LWT is 46°C and when 21°C it is at 34°C). I assume the MWT (Maximum Water Temperature) is allowed to float as long as it is greater than the LWT).

Is it really a lot of hot air, it may be air at 50°C, but probably not that much in volume (or mass really). As said above, commercial kitchens are a different problem, they need tonnes of air moved though them, this is why it is so cold waiting to pick up a Chinese takeaway, all the air is sucked out the building (actually bows our roof) by the extractor. Some energy will be recovered by the MVHR as water vapour turns to liquid. https://www.engineeringtoolbox.com/water-properties-d_1573.html

Yes. No need for anything fancy. I have always like SMA and Fronius. Don't get hung up on any live monitoring/remote monitoring, after a year you will not look at that data. The SMAs had Bluetooth built in anyway, so you can easily download the data locally anyway.

There are. Generally the greater saving from triple glazing during the winter and at night, the two times that the PV is either working at a low level or not at all. With PV it comes down to how much you can actually use, so the calculations go a bit wonky if you have to fit battery storage or a larger DHW cylinder. It is always better to reduce the need for energy, rather than substitute those losses with energy. The particulate problem is greatest where the WBS actually is, so rural people are hurting themselves at the same rate as city dwellers, but they just have a lower intake of particulates when they are outside. Having said that, go to any village down here in the winter and you can smell the air. Not all rural people have no neighbours. We are heading towards them being banned completely, just how long it takes.

I heard a saying the other day, "if someone is wearing ethnic clothes, don't bother to argue with them".

What do you think 'clean' means? Non-visible?

Except 'one peddle driving' reduces the use of brakes, and tyre wear may be reduced because of the different power delivery to the road (this depends more on driving style). But yes, the motor type does not solve all the problems, just reduces them.

Oh yes, timber burning is a dreadful pollutant, not just CO2/kWh either. The overall efficiency is so low that it just seems a bonkers way to heat something when we have viable alternatives. I usually say to people that are advocates of wood burners to count the rings in the logs, and that is the number of years it took to grow. Then compare that to the hours that the log lasts in the burner. Rough guess, an hour a year. That is 0.01% 'time efficiency'.

That just reduces the amount of time it will happen. You can get condensation at much higher temperatures. We have a range at work that gets condensation on it, and the temperature is probably over 50°C. If I remember, I shall try and put a probe on it and take a picture.

And, for the same area, it will give a greater energy yield per year than growing timber, by a factor of at least 40.

Or Catholics

You may be able to get away with a cheap, 'non inverter' type then.

Base the power calculation on the same flow temperature i.e. 40°C, then adjust floor insulation in the extension, along with pipe spacing, to suit.

It is because it is distributed generation, but it still feeds into the main electricity grid. It does not supply electricity, ready to use out of the box, for locals people. It is still conditioned, stepped up in voltage, connected via a relatively small sub station, usually via underground cabling, into the main grid (those huge pylons). A large thermal plant (gas or nuclear) does all that at the facility and then the cables are run in. The difference is that a nuclear plant may be turning out 3 GW, a large windfarm 50 MW (occasionally) and a solar farm probably less than 5 MW. So there is a lot of planning for this, and it that which can cost money, and then not succeed. Renewable Energy has relatively high fixed costs, but very low running costs. I have often wondered how much energy the site at Hinkley Point would have generated with 15 year old RE technology by now. They could have installed a very large solar farm and some 7.5 MW turbines on the site, and all the infrastructure needed was already there.

There is nothing inherently wrong with a block built house, but like everything, it is the attention to detail. You can still achieve a good airtightness value (aim for <1), a good U-Value, so insulate better than building regulations. Windows are a tricky one, double glazing, rather than triple, but fit MVHR, then no need to worry about trickle vents showing (they make windows look unfinished). Heating is then the difficult one, but if you design for a heat pump, but fit gas or oil, when the time comes to swap the boiler (and if you buy a cheap one, it will need swapping) the new owners may not have a choice about what they fit. Do you remember the Windows 98 Ready slogan, well your house will be Heat Pump Ready. Don't fret about the embodied carbon and energy in the materials, you can look at ICE and work out that it probably does not make a huge difference over 20 years, let alone 1000. Save money on the fittings, so basic stuff, no automation, a passable kitchen (if it looks good, it is good) and simple white bathrooms (steel baths). You can always sells the potential about what can be done, rather than your dream.

If people want more information about UK energy then DUKES. https://www.gov.uk/government/statistics/electricity-chapter-5-digest-of-united-kingdom-energy-statistics-dukes

Here are the last few years wholesale prices for base load. (ofgem) Pretty stable for until last year, and when EDF sell me off peak power, they cannot be making anything on it.

Already happened, the road fund licence, which was £0 on EVs, is now £150/year I think. A back of the fag packet calculation: 30million private cars, mean RFL £100 Mean fuel consumption 30 MPG, mean annual mileage 8000, mean fuel cost £5.70/gallon. Fuel taxes 65% RFL = £3bn Fuel Taxes = 26bn Round that up to £30bn, divide by the number of cars and you get £1000/year. About the same as my council tax, pretty good value really.

Looks like the sort of place where those special home made movies are made, or a special in door farm. Probably both.

I meant RIBA, it was late, and I was drunk. https://www.architecture.com/

Doesn't RICS have a a section on there website about what to expect and how payment should happen. https://www.rics.org/uk/ The one Architect I now know gets charged extra if he wants milk in his tea, and charged even more if he does not want it. Seems fair to me.

Your larger, newer house, will also benefit from having a better wall to floor area ratio. Heat loss should really be calculated like air loss, on the total surface area, not just the habitable floor area.

That is just statistical noise, if it was a couple of MWh out, that would be a different matter.

There is quite a bit of useful information on this site. https://www.engineeringtoolbox.com/hvac-systems-t_23.html

It is a very rare issue and normally caused by being too small for the job, or damage/lack of maintenance. The comparison with a small wind turbine is spurious at best.