@saecula-saeculorum You may find this useful, i did

ENERGY-STATS.UK "https://energy-stats.uk/what-size-heat-pump/"

What Size Heat Pump? | Energy Stats UK

What size heat pump seems to be the number one heating question discussed on social media. So we go deep here trying to help you answer that question.

As for drilling for a GSHP I doubt the small increase in efficiency would be worth the extra cost compared to an ASHP

@saecula-saeculorum 
Have you considered MVHR?  Assuming you haven't done the ceilings yet, it shouldn't be expensive in the context of a 'new' build.  Ours cost £5500 out of a total build cost of c. £400k.  It manages humidity very well and I can't imagine ever having a condensation problem. Whilst it uses some energy, the heat recovery should more than offset the cost.  It also means your house can (and should) otherwise be relatively well sealed.  I think it's probably the best value feature we put in the house.

@bontwoody Great thanks!

Will read up on this!

Posted by: @bontwoody

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As for drilling for a GSHP I doubt the small increase in efficiency would be worth the extra cost compared to an ASHP

Ah... but this site is in Cornwall. 😎 

There are a number of good reasons why GSHP installations are proportionally higher in Kernow than on the eastern bank of the Tamar.
Local knowledge is really important when investigating the possibilities for borehole, trench or mine locations of the collector pipes.

The most highly-regarded GSHP manufacturer, Kensa, are situated right at the Western end of the county.
You can be sure that they're not there due to  ease of access to customers across the UK!

@saecula-saeculorum - can you give us a better idea of which end of the peninsular you're at?
The nearest market-town would be good enough.

I'm in West Devon, with views across to Bodmin Moor.
And I'm a self-builder with fair knowledge of local materials and the Building Regs.
So I have a good idea as to what's possible in the area.

Posted by: @saecula-saeculorum

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 Out of curiosity how do you find the noise levels of your ASHP?

We are never aware of the 11kW Ecodan when we are inside, or out for that matter.  My neighbour's house is 6 metres from it, and he hasn't remarked on it at all.

@redbuzzard Hi there - never heard of it but will defo look into it.

We actually have yet to decide on insulation per se, so looks like I'm asking here at the right time as people are supplying so many useful pointers!

Thanks!

SS

Posted by: @redbuzzard

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Posted by: @saecula-saeculorum

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 Out of curiosity how do you find the noise levels of your ASHP?

We are never aware of the 11kW Ecodan when we are inside, or out for that matter.  My neighbour's house is 6 metres from it, and he hasn't remarked on it at all.

Great to hear! Or not as the case may be!

👍

Hi Transparent,

We're between Penzance and Lands End sitting on good ol' fashioned Cornish granite, which is also precisely what many of the older houses here were built from!

Thanks!

That's a lovely spot to live. Did you remember to set your watch back 50 years? 😉 

You really ought to book a visit to meet the team at Kensa Heat Pumps TR4 8RJ
That's about 40mins east of you.
Ring first, and tell 'em you'll be there drekly.

Posted by: @transparent

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That's a lovely spot to live. Did you remember to set your watch back 50 years? 😉 

You really ought to book a visit to meet the team at Kensa Heat Pumps TR4 8RJ
That's about 40mins east of you.
Ring first, and tell 'em you'll be there drekly.

Thanks! I’ve already emailed them so should hear from them soon!

The pace of life is significantly slower here usually alright, although the summer months are quite busy!

SS

Hi,

Great forum - wish I'd found it months ago!

14kW Mitsubishi Zubadan ASHP - 18 new radiators, 250L hot water tank

4.5kWp Solar PV with 3.67 kw Inverter - installed post FIT

13.5kWh Tesla Powerwall

EV - so can get Octopus Go EV charging tariff

Home Assistant on RaspberryPi keeping an eye on things!

Best to all

Welcome @steevjo

Interesting see you're using Home Assistant on RPi.
You might want to read the discussion on Connecting Home Assistant to Midea Heat Pump, which raises questions about using that approach...
... and is starting to deliver a possible solution.