ASHP - Investigations and calculations

Air source, ground source and associated systems for heating homes
Swwils
Posts: 530
Joined: Sat Feb 26, 2022 12:58 pm

Re: ASHP - Investigations and calculations

#51

Post by Swwils »

It's not complicated.
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Joeboy
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Location: Inverurie

Re: ASHP - Investigations and calculations

#52

Post by Joeboy »

Andy wrote: Tue Oct 31, 2023 12:57 pm
Joeboy wrote: Mon Oct 30, 2023 1:26 pm
richbee wrote: Mon Oct 30, 2023 1:19 pm
I don't know, but I guess not - the quote just says "Our Surveyor will perform a detailed assessment of your home that allows us to prepare your final system design"
It is a good idea - we've done some work on leaks, especially in the 80's lounge with suspended floor, an open fireplace & non-insulated cavities
I wouldn't think they would, more likely a tickbox scenario. I find the idea of the HP fascinating. I might have a crack at working out my own place in Scotland for kW req's. Is there a generic calculator to use?

I also bought another 3 rolls of the 1.5mm insulation strip we used at daughterlys in Edinburgh. The leak sealing makes such a difference as its 24/7 switch off. I'll be going back round our place next week.

Are you booked for a surveyor?
Google 'Macs heat pump calculation spreadsheet' and you should be able to find the latest spreadsheet. It's simple to use and I've done a friends house in a few hours. It worked out fine with his heat pump. Just create rooms/dimensions etc. There is a drop down for common house build types for walls/roofs. You can also create your own build ups. It also does the design temperature for area as well. If you run into difficulties give me a shout. There is another document to use with it if you wanted to do boreholes and then work out the size required. I found a site that gives very detailed geology for scotland though I can't remember where. This is a good starter for working out the heat flow. This will be worse case round here as there is a reasonable through flow of water through the cracks in the granite. A friend in Torphins was close to the limit on his borehole as there was too much water flowing out! He has amazing stats on his 80's bungalow with a simple on/off GSHP. They are at the bottom of the hills though so a good bit of pressure.
Thanks for that Andy, much appreciated 👍. I'll do it out of pure noseiness and Winter boredom. I did indeed Google MCS heatpump calc spreadsheet.
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AGT
Posts: 610
Joined: Sat Jan 29, 2022 11:26 am

Re: ASHP - Investigations and calculations

#53

Post by AGT »

I paid a tenner and used the heat engineer app, didn’t know about that one, it was fine to use, I had all the measurements written down before so just plugged the info in.
richbee
Posts: 412
Joined: Tue Apr 19, 2022 3:39 pm
Location: Northumberland

Re: ASHP - Investigations and calculations

#54

Post by richbee »

Swwils wrote: Tue Oct 31, 2023 1:22 pm It's not complicated.
I thought the bits around windows, soffits, facias, pipes, incoming electrical wires etc were tricky, especially if you don't have much roof overhang?
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Swwils
Posts: 530
Joined: Sat Feb 26, 2022 12:58 pm

Re: ASHP - Investigations and calculations

#55

Post by Swwils »

Nah there are now more products on the market to sort it. It's not complicated and if you like you can DIY.

Once you are sealed up you need to think about ventilation - the two go hand in hand but it's transformative.
MrPablo
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Joined: Mon Oct 17, 2022 1:26 pm

Re: ASHP - Investigations and calculations

#56

Post by MrPablo »

Just spotted this, might be a useful option for people to try for heat pump sizing.

https://heatpunk.co.uk/
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richbee
Posts: 412
Joined: Tue Apr 19, 2022 3:39 pm
Location: Northumberland

Re: ASHP - Investigations and calculations

#57

Post by richbee »

Right! I've signed up for octopus to come & do the heat pump survey🐙😁
Potentially have to wait 8 weeks for that to happen
Solar PV since July '22:
5.6kWp east/west facing
3.6kW Sunsynk hybrid inverter
2x 5.12kWh Sunsynk batteries
Ripple DW 2kW
Bugtownboy
Posts: 908
Joined: Tue Jun 01, 2021 12:35 pm

Re: ASHP - Investigations and calculations

#58

Post by Bugtownboy »

Where’s the fingers crossed emoji ?

;)
Swwils
Posts: 530
Joined: Sat Feb 26, 2022 12:58 pm

Re: ASHP - Investigations and calculations

#59

Post by Swwils »

Take care as octopus size for 50C flow which might not be what you want.
Andy
Posts: 420
Joined: Sun Aug 29, 2021 12:16 pm

Re: ASHP - Investigations and calculations

#60

Post by Andy »

Swwils wrote: Sun Nov 05, 2023 8:40 pm Take care as octopus size for 50C flow which might not be what you want.
Yeah they are delighted with their cosy 6 which I have been unable to find any stats for whatsoever. They say it is a high temperature heat pump but I'd be very surprised if it is one of the fancy compressed helium based ones which do have good COP at higher temperatures.
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