MikeSharp01

They just do sometimes - is it a normal breaker or one with earth leakage (Residual Current Breaker with Overload protection - RCBO) detection- if the latter then it is even more likely to trip, our oven regularly trips the RBCO when we use excessive steam!

That is an interesting link - we live right on the boarder of London, 120m to London from here, and the overhead line that feeds us comes from London, yet we pay 16p a day more than our neighbors who do live in London and they pay slightly more per unit than we do. All a little bit mad. I must try and find out how this is calculated.

If they are RECC members then they must also be MCS certified as the latter enables the former. So you may have two codes to leverage your claim but they may both give you the run around. Have you looked at their, RECC's, FAQs if things go wrong - https://www.recc.org.uk/consumers/if-things-go-wrong might help.

Is it terrazzo surface you are going for? If so then a big chunk of the cost will be tooling for 157m2 you will get through a vast quantity of industrial diamonds and the associated pads.

It must not be a private organisation it needs to be publicly accountable and with enough power to get things done. In my view getting all the leading bodies under this on wing would make sense. So include EG MCS / FENSA / GASSAFE etc should also be accountable.

I found that the 75mm fits neatly into the 90mm and the seals work as well. So I have just used tescon tape around the joint to be sure it won't come apart.

Sans Zombies one presumes!

Yes if feels right to feed a Zombie - it just keeps shuffling along with with its limp hands on the ends of outstretched arms emitting a constant moaning noise. I wonder if Simon Pegg is on the forum, he would know what to do.

Which window system are you using - I expect others would like to know as it simplifies so much to get them fitted air tight?

Have your installers agreed to doing this as it seriously limits the time they have to get the windows in and fixed.

Makes sense to support all the edges, we have kept a pile of off cut battens to do it between boards on our boarding.

At the risk of offending our fellow members - WTF.. you can actually prove, using the three riders of the MCS apocalypse viz; data, physics and algebra that you only need 3kW and that your DHW demand is manageable in that envelope so why emit the carbon making an 11Kw unit when 3 will do it. This whole game is madness but if you want a decent EPC, in your self build, then your choices / options are limited.

Not sure, others can probably give you a better steer EG @JohnMo, but I wonder if the 3 port valve in front of the buffer might lead to short cycling and defrost issues if the coil in the DHW tank does not have sufficient volume for the defrost cycle, the ASHP is not in control of the 3 port and it, the coil, is the only thing engaged when a defrost happens.

Did you mean 'do' rather than 'don't'?

I think the Judge is worried about incarcerating him because he will still need his security detail!

Although it is what it is, the EPC system, but doesn't that make a laughing stock of the whole EPC panjandrum.

How did the SAP assessor 'see' the Willis heater - others on here have said it really hit their SAP outcome having direct electric heating?

We went strap as well but I wrapped the pipe with strips of sponge carpet underlay to be sure I isolated any vibration.

I am being told I may need one for the defrost cycle but as far as I can see it's only about ensuring that there is enough water no matter what the secondary pipework volume is depending on settings IE in my case when the DHW coil is shut - OR the UFH is closed so it's only needed because the ASHP's are not designed to take command of those valves to ensure enough volume is engaged for defrost. In the case of rads I guess it's that for ASHP systems and for boilers the cycling problem to be sure any uncontrolled TRV rads don't limit the water volume too much.

I Guess we are saying the same thing to increase the delta you either have to lower the return temp or raise the flow temp. I am not a dedicated follower of the KISS approach to controlling these things, although the simpler the better idiom I do agree with - where we make it as complex as it needs to be to make it better while controlling the complexity. We have access to a vast array of controlling technologies which should enable us to do amazing things with ASHPs including data science, machine learning & internet of things (IoT) and we are really only up against the physics in the corners of this. I tend to think of it as being akin to internal combustion engine management systems development, so, in my mind, we are at a stage of about 50 years ago emerging from the era of the K-Jetronic with Lambda from 1976 as things are. Therefore my conjecture is that we are just at the bottom of the S curve with ASHP technology, @ the breakthrough point, where more understanding, better controls, improved materials and better design all round will precipitate a much more rapid growth of capability and uptake. The only thing we risk at the moment is failure because we, the innovators / early adopters, give up on it because without us trying everything the future is bleak. Naturally some political backing may be needed here even if it really wasn't in the development of engine management until the emissions came to the front.

Or you need to reset / adjust the delta T or turn it off for a period so the next run will be longer.

Welcome to THE forum for people like us - good luck, we stick built our frame under the careful instruction of our Structural Engineer.

Welcome to THE forum for people like us - wherever they may be.

Yes - I was thinking of just getting all the databank one place and doing some data mining to see if there were any correlations, interesting stuff in it. Suppose we had columns for: Quote value Area of house Number of floors Heat demand Size of ASHP recommended Make of ASHP recommended DHW volume Number of people in household Space heating scheme ufh / rads ufh+rads Number of Zones / Rads Control system included Control level simple / WC / full automation. Etc

Wonder if @SteamyTea might be up for trawling through all the quotes we have had and doing some analysis to see if it's a y=mx+c and if c = £7500 or just how it scatters.