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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 20, 2025
Topics: 17 / Replies: 2881
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RE: Do I need a bigger volumizer?

Can you provide some more info? What leads you to believe its oversized. If its cycling, how often, at what oat? Roughly what's the system volume ...

2 years ago
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RE: Heat pumps and OPEN VENTED DHW tanks?

Absolutely nothing at all to stop any ashp being used with a vented tank except that I'm not sure anyone advertises a vented tank with a large enough ...

2 years ago
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RE: ASHP & Buffer Tanks

Agreed. With two or three isolating valves it can even be done reversibly. Basically bypass the buffer tank on the flow, bypass the secondary pump,...

2 years ago
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RE: ASHP & Buffer Tanks

Before answering the question I think its worth rehearsing the theory of how buffer tanks are supposed to work. Firstly as @derek-m says any tempera...

2 years ago
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RE: ASHP & Buffer Tanks

Unless your system volume is very low it's likely, given those those figures, that your buffer tank is costing you 10%+ in efficiency or thereabouts, ...

2 years ago
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RE: Do setbacks save energy without compromising comfort?

@kev-m It's good to know that this is possible. I suspect, however, that the people best able to devise a central heating control system don't work ...

2 years ago
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RE: Do setbacks save energy without compromising comfort?

My post on the subject a few months back was a crude attempt at just such a model. Basically it considered the house as a single mass, leant heavily...

2 years ago
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RE: Do setbacks save energy without compromising comfort?

Sorry but this and the like is a part of the reason that I am losing interest. To me its vital, where complex systems are involved (which this clea...

2 years ago
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RE: Do setbacks save energy without compromising comfort?

To be honest I don't see a difference between a 2.6kWh 'error' and a 3kWh 'error' on a value if 36kW. Both are within the quite evident noise. Also...

2 years ago
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RE: Do setbacks save energy without compromising comfort?

It is indeed exactly that. There is a very plausible argument that fast cycling, at a rate sufficiently fast that the temperature of the circulatin...

2 years ago
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RE: Do setbacks save energy without compromising comfort?

Fair enough! As I have said many times in other contexts, good enough is good enough and the perfect is sometimes the enemy of the good That...

2 years ago
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