SteamyTea

I don't think in the UK it will make much difference. Not as if we high temperatures, with associated high amount of AH. We basically have a very stable climate. RH and Temperature is in a small window compared to most parts of Northern Europe. More a case of don't you wet systems when building a house.

Whoops forgot to post link in. Any would probably do though. Possibly. Could be an easy way to check air leakiness.

Yes it will, apart from what is lost via noise. A room does not hold much air, by mass, in it, and it only takes 1 kJ.kg-1.K-1 to heat air up. A 300 W heater can heat 10 kg of air (about 8 m3) by 10 K up in 333 seconds (5.5 minutes). You can work it out as you know the room size and the RH levels. Use this calculator to work out how much (little really) water is mixed with the air. Latent heat of fusion for water is 2264 kJ.kg-1.

Some rise in air temperature will come from the latent heat of fusion, gas to liquid, of the water. Most will probably come from the electrical input of the dehumidifier. If it is drawing 1 kW (or whatever), it is the same as putting in a 1 kW fan heater. That is why I laugh when I see an portable A/C unit in the back of a shop. All it is doing is heating the place up.

How much DHW do you typically use. May be worth measuring it or only default figures can be used. The cheapest option will be to use less.

If only I could eat chocolate, I would be out hunting them down. Chocolate may not taste as good now as it did to me 35 years ago.

More of a fine isn't it, tax usually only takes bite out, leaving you the rest. I often wondered why they did not make large bars from the same recipe as the green triangles.

I thought that, but seem to remember that he did not want to sell it as he felt the ongoing work next door would reduce the value. "do not spoil the ship for a ha'porth of tar

My gut feeling is that option 1 is the better one, but as @IanR says, it will need a VCL if bridging the warm, moist interior with the cold exterior. More detail.

Has no one tried blow torching to slightly char the surface yet.

Shame I have no interest in HA, or I could have come over and picked them up. Just up the road from you at the moment (relatively speaking).

That has changed significantly over the last 3 months. I think the only real way it to compare embodied energy and embodied carbon dioxide equivalent emissions. Cash values are a bit of a nonsense really, especially when inflation erodes the price paid.

It is also to do with the overall losses of the building. Floors are one of the biggest, single elements, and if UFH is fitted, the hottest. The really big one is that upgrading is almost impossible, so better off getting it in early at the design stage, rather than regret it later.

Taking an educated guess here, days of high humidity should cause more frosting up, but that may not correlate to a different CoP as it depends on how the HP defrosts. Modelling solar gain is tricky. Easy enough though windows, but not so easy though walls as they can take too long to warm up to affect the losses/gains significantly. Worth looking at wind speed and direction though. Generally the SW wind is warm and moist, NE is cold and dry. The SW winds tend to be faster than the NE ones. But, SW tends to be cloudy, NE not. I modelled my house for wind speed and direction a few years back think the charts are over at the other place. where I am we have so few NE winds, and the speed was pretty slow anyway, that solar gain did make a difference, but the SW winds dominated so much that it was not worth the worry.

Comments in the local rag about there being no pictures of the inside.

I think part of the problem with conflicting stories is that the roofers have to protect themselves. Re-tiling, which is in effect, refurbishment would take them almost as long as a complete roof replacement. You would feel a bit miffed if you spent several thousand on a refurbishment and then within a few years you had to change the timbers and tiles. Short of minor repairs, there does not really seem to be an half measures with a roof.

Either way, it will not be enough insulation.

Interesting. Is it actual OAT or RH, or a combination of the two, especially in the range where heating first gets used in earnest i.e. 8°C down to 0°C. Do you also compare the electrical energy, and the thermal energy, which is in effect the variable CoP?

Well they are short of 45billion.

Can see the Redruth transmitter from most of Cornwall, and probably bits of Devon. 173 metres high, on top of a 240m hill.

Drag it out, should pay for the heating bill.

Even my Mother, who is bed ridden and having speaking problems gets the answers right.

Not had TV for 25 years now. All the good stuff you can download illegally anyway.

Have you actually seen that done? When I worked in the PV industry the proper slate tile mounting kit was used. (we would put in a silly quote to slated houses as we did not want the job)

Get some echiums. https://outofmyshed.co.uk/tag/echium-growing-in-cornwall/ They grow very fast, and tall. So tall, mine fell over.