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Roel
@roel
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Joined: Jul 14, 2024
Last seen: Oct 11, 2025
Profile Activity
Topics: 1 / Replies: 9
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RE: Buffer tank in primary circuit?

Spoke to a representative of Joule today. He confirmed the volumiser was designed in to allow more volume for the defrost cycle. He said that the co...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

sure, he's currently on holiday...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

@old_scientist Thanks. We came to this conclusion earlier, but good to see it confirms our thoughts.Note, placing the tank as suggested in the article...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

@derek-m Sounds like a good approach. Would you still suggest changing the volumiser into a buffer tank to assure a defrost cycle? At one occasion...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

Many thanks @johnmo for the clarification. This makes it all a bit more clear to me. We seem to have a volumiser on the combined flow from the AS...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

Below some photographs of my system. Had a chat this morning with the plumber and he seems open for suggestions. He claimed the volumiser is the...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

@johnmo Ah, didn't know it's called a volumiser when placed upstream of the diverter, anyway extacly my point heating 50L for no reason. I ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

I agree we need the buffer tank when using thermostats (not ideal), but my main question is, should it be placed in the primary circuit i.e. in series...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Buffer tank in primary circuit?

@johnmo Agree. It's a 180m2 bungalow with modern 150mm cavity insulation.When questioned the developer, he said 'well, just to be sure it will handle...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Buffer tank in primary circuit?
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 32
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