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Lucia
@lucia
Member
Prominent Member
Joined: Jun 22, 2024
Last seen: Nov 23, 2025
Topics: 13 / Replies: 325
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RE: Two possible heat pump routes - how to evaluate them?

@jamespa I'm using the Delta T watts for both - proposed K22s and my existing K11s. Is that not right? 🙈 One designed for 50º flow temp the ...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

I have just discovered that BOTH my installer's heat loss proposals for 4 kw Daikins (based on imaginary heat loss and imaginary fully insulated walls...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

This is such a good analogy - it has really helped me to see the problem. I didn't realise that higher inside temps meant more heat loss. I don't kn...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@heacol thank you Brendon - that's helpful. BG want a buffer tank Octopus want a volumiser. To be fair, I didn't push back on the buffer with BG ...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@derek-m Thank you. If you get time please either have a look at the images I put in a post roughly a page back. Or see below: I got a link from Op...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@gunboatdiplomat I was being a muppet, sorry. 🤦🏻‍♀️ The Heat Geek guesstimate is double the Octopus quote for a...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@derek-m Thank you - that's great imagery - I have that kind of a visual brain so it appeals. I will play with it this weekend and have a go at tryi...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@derek-m I 2nd that and keep it slow and agonising for cavity wall insulation sharks. 🤬

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@bontwoody Theirs (from your link) is even lower than the MCS calcs. HG = 3kw BG = 3.5kw Oct =4.? These are all estimated ...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@gunboatdiplomat I haven't done a Heat Geek calc but have done a de Podesta calc on 1year's metered gas use (which HG reckon is ok). This gave me 5.61...

1 year ago
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RE: Two possible heat pump routes - how to evaluate them?

@bontwoody yes, I understand about larger rads and lower flow temperatures what I don't grasp (and that page doesn't explain because I don't see any m...

1 year ago
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