SteamyTea

I would hope it was used to minimise overall CO2e emissions, or the whole thing is pointless. The use of HPs is to minimise CO2e after all.

I will have to ponder this. I suppose the UFH is running, on average, cooler than the BT. Probably does not make much real difference in normal usage, but may at the extremes.

What is the advantage in covering timber frames with aluminium? Never really understood this, and I understand composites quite well.

With this set up, is there any flow advantage to having the Ts at A and B flowing strait threw and the buffer coming off the Ts? Whenever I see a bend or junction, I just see slower speeds. Hope that makes sense.

https://mcscertified.com/mcs-launch-new-improved-heat-pump-calculator/

There is a unit for breathability. GNs/kg.m Ask manufactures what the number is for their coatings.

@Mike_scotland Ask your builder for the room by room heat loss calculations.

@ProDave There is a similar joke about what going to prison for drugs offences does to you. The comparison is a 5p and a 50p piece. Just the shame as what is happening here, being shafted.

@Mike_scotland There was no response, just my quote.

They are if the CoP, Temperatures and outputs are identical. So basically no. They all perform slightly differently at different temperatures. And to make matter worse they have different controllers with different terminology. Not wanting to teach my grandmother how to suck eggs, do you know the basics of how an ASHP works and what parameters change?

They have been discussed on here quite a bit. Do a search for them. I think one person has had one for quite a few years.

Works for me. Interesting this legionella cycle. If you are heating with an electrical element, any water that touches it is going to be zapped to about 200°C for a few seconds. I wonder if that is enough without having to do a separate cycles every now and again. Different scenario if using a coil of a heat pump, but probably fine with a higher temperature gas or oil system.

Interesting, probably needs more unpicking. Does if face South West, or is is shaded from sun and wind? when you say well ventilated on the inside, do you mean in the room, or in a cavity? Was the right mix of render used?

Do you know the relative humidity in the room/building. Would have thought that would be a good gauge to how dry the walls are.

" Hot water: Most of the excess was captured in the hot water tank using the Solic 200 controller and a 1kW twenty seven inch immersion. Twice even reaching over 60C resetting the countdown timer designed to warn us when the tank has not been over 60C for more than 10 days." I take it that is just for a legionella cycle?

Will it actually pull out a twisted nail?

Going to look at it later. But you use MatLab. May ask you to do me a favour.

Hello. If you ventilate the inside of a house properly, there is no need to go the lime route. Lime and cement render are not drastically different in breathability. And with cement based, it will at least set hard enough this decade.

You will have a number of problems being energy self sufficient. Wind and especially solar power, which is several times cheaper than wind, is very difuse energy. So you need lots of area that is unaffected by shading. South facing is best, but systems can be split up electrical, so they can perform better. An ASHP is now, if bought independently, the cheapest renewable heating/DHW system you can get. Linking PV and an ASHP is not technically hard, it just gets expensive. If you have mains power, have a word with your DNO to see what size system you can connect. The usual limit is 4 kW, actually 16 amps per phase. DO NOT tell them you want an ASHP. That will just cause problems.

I often get offered old slates. Seen skips half full of them. Bit of a trek to pick them up mind, unless you are local. There is a reason it is called Land's End.

Can you angle grind the head off with a sanding disc, then force the timbers apart?

Or how low is a roof. Generally a fence can be 6 foot high I think. Modules are usually 1m wide by 1.6m tall. If you tilt that fence as I suggest, you will get more modules on it, and better yields. Say it is to deflect noise. Works by quantum effects.

Welcome. Graven Ill?

Mixed units. £1938/m². Could build a proper house for that.

The 9m² is for domestic. Commercial is totally different legislation. Mainly because they are dealing in hectares, 10,000 m², rather that a few m². Worth remembering that for every rule that says you should do something, there is another that says you can't.