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SUNandAIR
SUNandAIR
@sunandair
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Joined: Dec 30, 2022
Last seen: Jul 9, 2025
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Topics: 5 / Replies: 495
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RE: Optimising ecodan ASHP

@harriup On our system this morning, set temp has been passed by 0.5c and the current cycle is continuing. It is about 90 minutes long and still run...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Optimising ecodan ASHP

harryup it looks, to me, like a clever way to modulate when the HP Can’t operate at a low enough flow temp. It’s clearly shortened the cycle to 30 m...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Optimising ecodan ASHP

Very curious, this Rod Ive always understood from heat geek video that the poorest efficiency stage is at the beginning of a HP Operation cycle and ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

James, can you remind me what is your definition of setback, in terms of temperature? What are you defining as target daytime room temperature and wha...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

a second look for derek

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

@cathoderay thanks for that update youre right imo, and that’s why I started with the extreme example ... 20% is significant although JPA might still ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

. @derek-m very funny realizing that’s you just being your humourous self I won’t bother reminding you and James that I did say it was an extreme e...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

I think @jamespa quoted you are thinking there is only a 5% saving when operating a setback. This obviously seems a small saving for the effort of doi...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

I’m a bit lost on this thread can someone enlighten me if the topic has changed? It was : “Do setbacks save energy without compromising comfort?” ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

Of course... I’m sure it will be enlightening.... btw ive attached the following hourly chart showing the modulated operation for 56 minutes (not 30...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

@rod and Derek.... fascinating graph esp to see the kw used to restart heating after defrost. I can’t get that overlay on my graphs. However there i...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Optimising ecodan ASHP

That’s ok… if you’re getting the room temperature you want at all outside temperatures then you may as you say, be lucky and have got the right WCcurv...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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