Gone West

Thanks,that's a good idea, I shall remember that for my place. 👍

With that usage you could buy a lot of electricity for the cost of the Genvex.

I wonder if the same will happen again. I'm wondering about fitting a replacement oil boiler or A2A heating.

I think the key sentence from that report was: "They are particularly well suited to highly insulated homes with a small heating and domestic hot water demand." I think mine was working at the limit of what it able to.

I can't really remember what happened about prices in 1973, other than the petrol ration books, at that age I had other things on my mind. Did the price go back to what it was before?

I don't exist anymore. Anyway it's spelt PeterStarck.

I think the OP is talking about the Ecocent type device which is a DHW tank with a small ASHP on the top although not heard od Haier. I had a Genvex Combi 185LS which was a combined MVHR, DHW tank and EASHP where the EASHP heated the water tank and the output from the MVHR.

No, we're in the nice bit of Cornwall. It's the sandstone filtering the water around here rather than the chalk where we used to live.

That's what ours looks like. I like living in Cornwall.

We bought a Genvex Combi 185LS direct from Denmark in 2017 so we didn't have any real problems with delivery and we reclaimed the 25% VAT successfully. One problem with buying large items like this from abroad is that it may be difficult to get warranty problems sorted out. We were told it would have to be returned to Denmark for repair.

Well done, my guess is that the biggest factor is the low house temperature followed by DHW heating. With low temperature radiators you are using the ASHP at near it's most efficient. I'm glad it's working out well for you.

It somehow chemically affected the surface of the sandstone making it shiney and smooth.

As a point of interest we had honed sandstone paving pathways at our last house which weren't slippery when wet. We found out the hard way that sandstone is badly affected by salt (NaCl), when I put some salt on some weeds growing near the edge of the sandstone. It isn't therefore a good idea to put salt on icy sandstone paving.

At our last house we used to heat our 185 litre DHW tank to 45C with an EASHP. Our mixer showers and our bath thermostatic valve worked fine. Only two adults in the house and we never ran out of hot water.

No, not yet. I don't know if PHPP would be a good model to use for and old solid walled stone building. I have done some basic heat loss calculations and at the moment I've calculated the heat loss as 17414kW with a 24C temperature difference and I should be able to reduce that to around 11237kW with some straightforward improvements.

When I was playing around with PHPP, using 2010 Version IIRC, my house was 13kWh/m2a at 20C and 15kWh/m2a at 21C. I also found the results varied a lot depending on the climate data used. I plugged in several different sets but all I can find now is the data I created using Meteonorm for my area, when I was in East Kent, which I finally used. I also created an average for SE England from Met. Office data which gave results of 11kWh/m2a. I decided to be cautious and settled for the 13kWh/m2a.

+1

You may not think they are exotic but I think they are smart and suit the style of the property well.

AIUI as from 1st April 2022 the 60% rule no longer applies.

It didn't seem clear to me whether that was when purchased or only when installed by a company.

That looks good. If you don't mind me asking what size is it and what make. I'm looking for something similar.

Yeah, electricians and plumbers are generally drama queens 😄.

This might be the case, if you have cavity walls. I have the same recommendation on my EPC and all my walls are solid. EPCs based on RdSAP are generally crap.

https://www.moneysavingexpert.com/deals/homebuilding-renovating/#53584

IIRC the GPO cover the Post and Telephone services.