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Heatgeek
@heatgeek
Member
Reputable Member
Joined: Dec 16, 2024
Last seen: May 4, 2025
Topics: 1 / Replies: 111
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RE: Yes, the "zoning with ASHP" topic again...

@harryrea I agree entirely with the concept of zoning for practical purposes, especially for control of comfort. For example, I have a log burner in ...

10 hours ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

This could be mitigated by putting a one way check valve on the top input so that flow is only downwards. Can't think of any detrimental effects.

1 day ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Apologies. Poor choice of words. Delete "dilution of temperature to emitters is minimised".

2 days ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Only the difference in flow between the heat pump and the emitters passes through the tank. This lower flow helps to preserve the stratification of th...

2 days ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Note a key point here though. The primary pump is connected in the return pipe while the secondary pump is connected in the flow pipe after the buffer...

2 days ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

@potatoman No, the installation is exactly the same as a 4 port buffer with primary and secondary pumps except that the output flow bypasses the top ...

2 days ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

@ashp-bobba I am afraid that you are talking to the wrong person about manufacturers preferences. However, as far as I can see, it functions the same...

2 days ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

@potatoman As no one seems to be obliging, I attach a diagram. The idea is that only bypass flow goes through the tank when necessary so it is undistu...

2 days ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

@trebor12345 The Auto function is supposed to adapt automatically and select the right curve in constant pressure mode. By default the pump is set to...

2 weeks ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

@trebor12345 Your house is remarkably similar to mine, layout included. I have 185 sqms with 4 beds and 2 baths, same size lounge with exactly the sa...

2 weeks ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

@trebor12345 Use the internal private messaging system on this forum.

2 weeks ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

@trebor12345 Re your question about changing setting to controlled DT, this may be worth trying if your current DT is 1C as the heat pump will automa...

2 weeks ago
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