SteamyTea

No, it is to do with the shank.

They all do, that is how bolts work. This Screw or Bolt debate has been done before. It is material independent and is all to do with what is being joined together and why. Bolts need washers as well.

Full thread is a screw, partial thread is a bolt.

Yes, and that is why they are used. Over a year, they will still stave energy/money, compared to resistance heating, even when the outside temperatures are so low they fail to 'work'. I don't think there is much difference in running costs compared to gas, assuming both system are working as designed.

Had then down here for weeks.

You can argue, on that basis, that night storage heaters are a viable option. And is electricity really that expensive for a low enthalpy fuel, it is less than gasoline at the pumps, and look at the taxes on that.

Back in the 1980s I lived up country in Aylesbury. One very cold winter I thought my gas heating had gone wrong. House was chilly and the boiler was alight. Turned out it was undersized for those conditions. That is when I found that 10 quid fan heaters are brilliant for warming a place up quickly. (My original one has just packed up after 35 years, but it was my fault, opened a door into it and stopped the airflow)

Wrap some self regulating tracing heating as close as you can to the problem area.

I shall add to that. Is it 50 quid every single week. I just put £40 of fuel in my car today. So now have free motoring for about 400 miles.

Others have done the work. https://www.electromaker.io/blog/article/9-best-raspberry-pi-smart-home-software-options But I like to keep things as simple as possible.

I think the problem is language. it is hard to describe in words how it varies with time. But you know what, there is a second language that we all speak, with varying degrees of understanding. Mathematics, use it.

Yes, as has Jeremy Raspberry Pi's seem popular.

Have you done your own quote. Sit down, work out your thermal losses (you have the data already), then go looking for the parts.

If you mean into a wall socket, it is because it will weld the plug to the socket and crack the plastic. 13Amp wall sockets are only rated for a 10Amp continuous load.

Right way around

Isn't that like claiming a car a cost a fortune in fuel when it gets filled up, but totally ignoring all the days it does not get filled up. I don't think the vast majority of people give two hoots about emissions, they want the cheapest. Even if they don't understand the technology. Selling it on emissions is a dead end. If I had said in 1974, "I have seen the future of motoring, it weights 2 tonnes and does 15 MPG" I would have been laughed at, but Land Rover have sold 1,000,000 Sports versions of the Range Rover. By learning about them, it really is not complicated, just a bit of addition and multiplication. There are plenty of resources to find out about them, but also plenty of dreadful one. People need to treat it the same as buying a car. You probably needed the 18 kW model for your sized house, but only the 8.5 kW to cover your basic needs.

Have a look at the cylinder and see if there is an immersion heater. Follow the lead and see if it goes to a switch.

(expletive deleted) all as he only lets it run for minutes. I keep seeing the 'works best in a modern, well insulated, airtight houses'. We really must top this statement as it is really an incorrectly sized system for the house that is the problem. If you need to deliver x kW to cover your peak load, then fitting something that is x-y kW will not do, It will be too small, don't matter if it is gas, electricity, oil, coal or wood. Too small is too small, end of.

You are happy to let drunk holiday makers have a fire in your building?

I am always surprised how cheap these units are. People spend more on a few kitchen cabinets.

None of this is going to be easy, even if we know the right answer. Do all split systems do that, or do some pump coolant fluid to the outside unit. And would you still need something to stop the vibration from the compressor anyway. Worth a bit of investigation surely. What unit is actually fitted, I can't be arsed to go and look.

Going to answer a question (somewhere between pages 3 and 53) about the noise of the compressor. Does it have flexible pipework fitted to it, or copper? Copper can cause noise transmission.

Our old mate @Jeremy Harris did that and found there was a lot of noise transmission. He RTDM and found it should be fitted with 1.5m flexible pipework.

Does it turn into vapour and cause damp problems in your house?

I thought it was Karen