SteamyTea

I think that is a dangerous assumption. Did they know the amount of insulation under the slab? Did they know your actual DHW needs? Did they use local weather profiles? Did they take into account thermal gain? Did you see a room by room heat load model? Usually (what we did) we just used the appropriate building standards for when the house was built.

I was going to pay you £1500 to do the job.

I think the main decision should be made on the availability of local skills. If there are no bricklayers in your area, then don't get bricks.

Isn't that like saying 'I recommend a Ford Kuga', but not specifying which trim level, year of manufacture, limitations and price.

As long as you fit a gas combi heating and DHW system.

I have got used to the rasping feeling. Like tomatoes, I quite like it now. (I stopped wearing underwear as a new year resolution back in 2010, and have saved literally a few kWh of marginal energy since)

Because it will be done drekly

Only the visible ones. If the inside of the outer leaf, or the outside of the inner leaf is parged, that cannot be checked. Nor am I, why I asked the question about people getting follow up air tests. Know the answer anyway, it is why we don't have true airtightness figures.

Are you creating a false correlation between HP size and price. There is more to a proper installation that just the maximum output. Thermodynamics is not exactly new, it is the same formulas that govern it all, and at the domestic heating level, not even complicated ones. How many people on here have read Without Hot Air, which is free and explains most of the issues, then moved on to something like this.

Part 2. There is pretty good data here if you fancy playing with a spreadsheet. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/946419/Sub_national_electricity_consumption_statistics_2005-2019.xlsx

Exactly, about time the public learnt this. We, as a nation don't trust government much, but are willing to part with cash to a salesman, while knowing nothing about a product.

In the same way a Tesla on Autopilot will slam the brakes on when when it sees a speed restriction sign on the back of a truck.

That is a valid point, we are going down the EV route and home charging will be expected to happen.

Ask Google. AI is not very good. https://www.google.com/amp/s/www.newscientist.com/article/2282240-ais-dont-understand-simple-physics-like-a-ball-rolling-down-a-hill/amp/

There are science philosophers that may disagree, but I don't agree with them. 32 years after his death, Paul Feyerabend's ghost is still haunting us.

It is mainly the over complicated and expensive BSI/Eurocodes system employed.

As most houses 'settle' over time, does the parge, render or plastering crack, leading to the airtightness diminishing? I have often wondered this but most people are reluctant to spend money to get a second air test done. This may lead to a false premise that any heating system is under performing, when in reality, it is a house leaking more.

What particular problems and why not in badly insulated houses? Take two houses that have the same heat load i.e 30 kW @ -5⁰C. Will a correctly sized ASHP under perform just because it is an ASHP, compared to a gas boiler? Does it even know it is an ASHP? Does a gas boiler know it will perform better because people on internet forums say it will? Design it right.

We have discussed to death the merits and drawbacks of different heating systems. The one thing that keeps cropping up is the lack of justified, and verifiable, design. Trouble is, no one is willing to pay for it, so what do people expect.

Change the word glue to advanced polymer adhesive and it sounds ok. As @markc says, depends on the glue and the size and quality of the mating parts.

I got a scaffold tower, and can do heights. £2000 of your English pounds. Will bring own tools.

Wire brush and a lick of paint will make it fine. Easy from a scaffold tower.

True for all buildings. And just about everything else that is made. There are more Fords in the world than BMWs.

One of the universities I lectured at got a load of laptops (was a fair few years back). They build a lovely wheeled cabinet to store them in, with wiring to recharge them. First time they got recharged, about 25 of them, in an airtight box, the temperature got so hot that they all got damaged.

Looks a Rachman rental. My insulation got disturbed and ended up sitting over the vent in the soffit. Sucked in wind drive rain, then wet the plasterboard below. So may be a problem, get it fixed. And a lick of paint on the window would not go a miss.