SteamyTea

Most of the world does, this is especially true when it comes to burning timber as a fuel source. You can get a lot of decent energy information from DUKES and the BP Statistical Review.

For some background stuff, read this (all of it). A bit dated now as he never saw how cheap PV and Wind Power became before he died. https://withouthotair.com/download.html

In a caravan?

Thank you. However, you will actually be FAR better off with the single 500 afaic. Can you easily fit an immersion heater (powered by the PV) half way up the cylinder, so you can heat the top half i.e. 250 litres, to say 60°C while the ASHP supplies the bottom have at 48°C, and still have a 'stable' system, or would too much turbulence happen? Here is what happens, thermally, inside my cylinder over 24 hours. and I can get two baths and a quick shower or two out of that.

No, up to the A30, turn left, 15 miles down the road, turn right at roundabout, after a mile or so the road turns to the left, it is on your right. Opposite side of the estuary from the old power station, where they were going to build a nuclear one, till they found the background radiation was higher than allowed for a nuclear plant. That would have killed the property prices in St, Ives. I had my trousers taken down in Treliske by a nurse, because I had broken my pelvis, about the same time that Samantha Camerone was squeezing another sprog out there. But don't anyone come down my end of the country while the G7 is on, the security is tight. Been told that I am possibly going to have to be 'escorted' to work. They have build two 'villages' that I know of already, and have heard rumours that the road next to mine is where the police cars are going to be based.

Now that is an idea, a copper water coil in a Cornish Nasty, they can burn the roof of (and off) your mouth many hours after leaving the oven (a McDs apple pie is the same, but smaller). Sorted, Pasty Power with Cornish Copper. (Phelps in Hayle is the best in the world, just make sure you go to the original place, not the satellite shops)

Why I suggested splitting the system into two, one for main use and the other of guest use. The space issue is an interesting one, we hear it a lot. Not sure what the answer is, maybe a smaller 'litre' like the US gallon compared to the proper Imperial one is the answer.

The OP will learn to use less DHW once it has run out a few times, or the bill comes in. If we are to take climate change seriously, then taking a shorter shower i.e. turn the (expletive deleted)ing water off when you soap up, is a very small price to pay.

How did you measure them?

48°C And ditch the 'disinfectant cycle'

Starts to kill the ASHO CoP at that temperature.

Band A council tax. But it does help with site security, and build quality being on site. And you can get to play with some technology on the cheap i.e. PV and Air 2 Air Heat Pump, or an Ecocent clone.

If sized correctly they should not notice it. My neighbours cars are less than 10 metres away, I don't notice them. But the dickhead that is 40 metres away I do. He still thinks that to start a vehicle you turn it over still it catches, then flatfoot it for 30 seconds. Now where is that old can of expanding foam, a squirt up the exhaust should muffle it a bit.

Have you defined what you mean by eco-friendly? Seems the sensible thing to do. Things missed, reality check, way to easy to get carried away.

I used to lecture in that and have one of my degrees in it. Good subject, full of 'gotchas'. I should have a look at the A Level syllabus to see what it is all about.

And reduce the losses, they are 3% on the AC side, and the meter have to be close to the main meter to get more accurate export readings (though this may not be important now) An Inverter can also chuck out quite a bit off heat in the summer, so you have to consider cooling. It can also chuck out a bit in the winter, so make use of that if you can.

There is a risk that you set the temperature too high to overcome the capacity limitations. This will cause the built in resistance heater to kick in, and your CoP will plummet. One way would be to fit the two main bath bathrooms with additional inline heaters, these will only start when the DHW temperature goes below a set point, say 38°C. Most of the time they will not be needed. The trouble with one, large cylinder, is that you ae always heating a large cylinder. A large cylinder will have temperature gradient, with the base being close to the mains temperature and the top close to the temperature that you set the ASHP to (say 48°C). This will give a mean temperature somewhere between the two. You can get around this by circulating the water in the cylinder with a pump, though I do not know anyone that has done this. That way, you can get close to the full capacity. On the plus side, a larger cylinder has lower percentage losses than than a smaller one (volume to surface area is better), but a well insulated system, in a well insulated cupboard, means these losses are not that significant. Strange no one has mentioned Sunamp.

Or just stick it on some OSB and call it; "My Building Journey" I stuck some broken slates on a board and got £800 for it once.

Professional British Pride. Better than the US forces maps, they can take out the wrong embassy without any problems.

The old saying that 'high fences make for good neighbours' springs to mind.

What sort of 'pay back' would that same outlay earn you from the bank, even on a 10 year deal? You will save more energy, and possibly cash, getting an EV now. 8000 miles in a car that does 50 MPH is about 7,000 kWh, and costs about £900 at £1.25/litre. An EV will use about 2,500 kWh (0.3 kWh/mile) and cost about £450 at 18p/kWh. A £3,000 bathroom never gives you a payback, nor will a £300 one, or a £10,000 one.

Thanks, it is what I thought. Can kill the CoP if there is a long spell at around 4°C, and cause extra defrost cycles, but hopefully you make that back when the temperature is higher. So the trick is to design your space heating system to run at as low a flow temperature as possible for the local climate, even if this mean an anti-intuitively, disproportionately oversized ASHP.

This is an interesting problem and needs to be split into a number of parts. The first one is what is your DHW heating type i.e. gas, oil, electric, heat pump, solar. What are the expected power outputs of each. The second is what your estimated DHW usage is, I think the 'standard' is 150 litres a day per person, which personally I find quite high, especially if the stored water is at 65°C. The third is the 'diversity', which is really just knowing how many showers or baths would run concurrently, and how much time between consecutive baths or showers. This will give you 'time to recharge' the cylinder depending on the heat source power and temperatures.. The fourth is 'what you expect'. Do you like long showers, say 20 minutes, daily baths for everyone (would be my choice if my water and waste was not over 8 quid a tonne), or are you like many on here that take a 3 minute shower? Only you can answer these questions. Technically, you can fit two systems, of different sizes and power outputs, say one to do the four most used bathroom, and another for the little used ones, or split it 50/50.

Building overheating. 6m2 could easily let in the same power as 2 3kW fan heaters. I am sure @pocster has the ideal sized roof light for you, especially if you have not cut the hole yet.

This may be to preserve the chillers, though I would have thought the hot part was outside, I find it hard believe they you be using larger standard chillers and freezers, which need a decent airflow around them. Down here, when we get a hot week (Cornish maximum temperatures are very really above 26°C), the local fridge engineer company is overwhelmed with fridges and freezers stopping working. A mate of mine had the same problem in his large pub kitchen, I suggested that instead of having the units against the walls, they full they out a few more inches, and get some fans blowing air behind them. And to ditch the stand alone A/C unit as this just warms a room up overall, unless it can be fitted in a doorway blowing in. I also suggest that they put tin foil on the roof light. Not had a hot week in years to try out my ideas.