SteamyTea

Do you still rent the batteries in those, or have they decided to sell them to you?

I have not paid in that much, nor have I seen a car that costs that much.

By how much?

Still not doubling in a decade. The ONS data is inflation adjusted.

Are the people that are making that car boomers? (suspect that some of it is inheritance money from the sale of his family farm, which is close to me) Seems that this is more a case of intergenerational wealth distribution. Still a ridiculous amount of money for a car. My 500 quid car can go further between fill ups.

Frequency distributions are probably the way to go i.e. mean flow temperatures by different temperature differences. There should be two peaks then, one for the space heating and the other for the DHW (assuming the flow temps are different).

I have not heard of this braking issue. Sound scary. And wipers should be very quick to adjust. With an iPace being designed by a British team, they understand rain and more importantly, drizzle onto dirty roads.

It is not often that a PV system will generate enough power to start an induction load like a heat pump compressor. You could fit a battery, and an over size inverter, then hope there is enough energy stored in the batter to start the ASHP while the PV is generating enough to run the ASHP and charge the battery. If an ASHP takes 5 amps to run (1.15 kW), and you have 5, 250W PV modules, the numbers seem, on the face of it, to match once inverter efficiency is taken into account. The problem is that the modules only deliver that 250W when the sun is allowing 1000W.m-2 of insolation to hit those modules, which is a rare day in the UK, and then they have to be facing the sun directly. Solar slates are very nice, hardly noticeable on a roof, but they cost a lot more and have lower output per unit area. And a lot more work to install.

Or incorrect for the doubling bit in the last decade according to DUKES. UK domestic electricity has gone up 35.5% since 2010. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/904105/Electricity_since_1920.xls

The bacteria is quite commonly found lurking in hot water taps. There is generally not enough atomisation if the right sized droplets to cause a problem. But there is a whole industry based on scaring the shit out of people about it. On another site, someone claimed that pneumonia was caused by contaminated showers, and she truly believed it, no evidence to the contrary would convince her otherwise.

I think what holds that back is the business model on commercial buildings. The building owner may not be the building management company, or the freeholder. Lease holding companies can put stringent rules in place as well. Not sure I want an electrician ripping my roof off, drilling into rafters, fitting flashing, or doing the structural calculations. The answer is to allow self management of the installation by making the rules and regulations accessible and clear. DNOs could help by having an open register of how much capacity can be fitted in any area, and what any upgrade costs would be.

Yes, I don't really have a problem with the EPC data. There is probably a reason that someone that claimed to be a Chartered Surveyor and fully qualified SAP assessor, was working in a local estate agent in one of the poorest parts of the country. She did go very quiet when she found out my background.

So about 1 MWh/year. Trouble is that it will be going into the main grid, via the very much larger local grid losses. Much better for developers to buy some land and stick a large solar farm on it with a dedicated connection. A lot of houses are just not suitable for PV, the roofs are at the wrong azimuth, shaded, too remote a location etc. Having said that, I still think about fitting some to my house. If I cheat a little (use the full width of my roof) I should get 8 off standard 1.6m by 1m modules on the SW facing side. Enough to heat DHW for 8 months of the year. So 2.4 kWp.

Not once steady state is reached. It could, possible, be a financial advantage.

And it showed my house having twice the area of all my neighbours, who have the same size houses. Think I shall get that estate agent to sell my place as she made it bigger than it is.

Certainly did. Best decision I ever made. Been on my own for over 40 years. When I shut my door, the world can vanish. Never understood people that have to have others around the house.

Is there any difference in performance depending on wind direction?

Can't really help. But thought I would point out that your area is more than the footprint of my house. So to me a grand seems a bit low.

Not just the cost and time. https://www.amazon.co.uk/Time-Eat-Dog-Sustainable-Living/dp/0500287902

Isn't the real problem that we still have cavities?

Yes it could as it would inhibit both the condensing and the evaporation phases. This is how a heat pump works. But look at the simple things first. Is your UFH fluid full of crud?

That is what system design is all about though; it is not individual component design. The biggest part of the problem is that we have got used to pretty awful heating design systems. This is probably because we retrofitted to existing housing stock in the 60's, 70's and 80's. The skill sets used to do this are very different from what is now needed, but plumbing technicians are not trained to be thermal engineers, nor should they be. So in my opinion, there needs to be 2 parts to designing a heating system: The sizing The plumbing The sizing may also include upgrading the thermal envelope, the plumbing is working out the best route for the pipework and the best type of emitters. Trouble is, for many installations, neither happens properly. Mainly because people are unwilling to pay. There are not many things in life that are worth paying a premium for, you don't really get better utility value from a BMW than you do from a Ford, but a properly designed heating system is one exception that you do. Now I am not saying that MCS installations are the premium system to go with, but at least, on paper, they have a system that covers the design aspect, even if it is not followed. How many people do we get on here in winter saying that their systems are not working, but when asked about heat loss calculations, they don't have a clue what we are talking about. Too many.

The ASHP is only part of the system. I think this is where confusion comes in. Take UFH as a thermal distribution element. It is a simple component, a pipe loop, usually set in concrete, with warm water passed though it. Then the problems start. It has to be designed so that the power enters the room, not heat up the ground under the building. It has to be designed to deliver the correct power 99% of the time, so different spacing between pipes and different thicknesses of concrete it is set in. There will be some situations where the system is used incorrectly, we have all read about the self inflicted problems Zoot created for himself, and there will be times, as you mention, where part of the system is fine, but other parts are not. This may be as simple as the controller not set up correctly. It may also be necessary to have a combination of thermal emitters in the same room i.e. UFH and a fan assisted radiator. I may have found a solution to fit a wet heating system into my small house without seeing horrible pipework on the surface. Going to have a chat with one of our regular customers who has just done his MCS course and see if he thinks it is viable. Just need to find a physically small, inverter, ASHP that he can buy for me at a reasonable price. Then work out where the buffer tank is going to go.

Can you turn off autocorrect?

You mean an inadequately sized system.