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Lucia
@lucia
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Prominent Member
Joined: Jun 22, 2024
Last seen: Jun 17, 2025
Profile Activity
Topics: 13 / Replies: 284
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RE: Two possible heat pump routes - how to evaluate them?

@derek-m Thank you. This is my dilemma. The BG original proposal designed for no cavity wall insulation @ 45º and came up with a heat loss of 5.6 a...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Advice on ASHP choice needed

@derek-m I was looking at both specially the red line for costs . I've posted those images before but no one said anything. Is heating capacity not w...

11 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Two possible heat pump routes - how to evaluate them?

@derek-m But if 🐙 design for 50º and you want to run the system at say 35º then more watts are needed no? Or am I still drowning in the Delta ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Advice on ASHP choice needed

@pie_eater Here:

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Two possible heat pump routes - how to evaluate them?

@judith Will do as soon as I can. 😁

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Advice on ASHP choice needed

@pie_eater I'm just offering my 2 cents to say I agree with the comments - your installer sounds a wee bit er... flakey. MCS guidelines are exactly ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Two possible heat pump routes - how to evaluate them?

@derek-m So I can't just compare the delta T @ 30 for both rads? Oh. my. days... I think I need to go to college for this. Back to playing with Heat ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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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 ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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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...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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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...

12 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Two possible heat pump routes - how to evaluate them?

@jancold Me too! 😁

12 months ago
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Air Source Heat Pumps (ASHPs)
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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 ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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