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Derek M
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Derek M
@derek-m
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Illustrious Member
Joined: Mar 4, 2021
Last seen: Sep 19, 2024
Profile Activity
Topics: 7 / Replies: 4405
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RE: Rethinking High-Temperature Heat Pumps

@jamespa I think that you will find the 55C for gas boilers is to ensure condensing takes place, and if the gas boiler is to be replaced at some tim...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

I suspect the problem relates to the fact that as far as I am aware TRV's still have to be installed on heating systems, which was the norm with gas a...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin Altherma 3 R Low Temperature Split ASHP cycling and flow rate issues

The first thing that I noticed is if you had to use a -4C offset when the weather was colder this would indicate that the cold end of the WC curve is ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

You are indeed correct, because in the real World installers include buffer tanks, LLH's or PHE's that are not normally required. The other point to...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Hi Judith, welcome to the forum. I suppose that you could politely ask them to explain in great detail why there is a need for a buffer tank or low ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Secondary pump speed - how much slower should it be?

@jamespa Hi James. Sorry for the delay in replying, I took a break from the forum at the weekend while the improvements were being made, only to f...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: How are Ecodan CoP quotes from MelCloud setups?

I would suggest that you look within the 'Service' menu at the 'Energy monitor settings', since it would appear that the estimated power consumption o...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 12kW Samsung ASHP set up help needed

You could consider changing the buffer tank into a volumiser in the return leg to the heat pump. This would remove the need for balancing the primar...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I fully agree with Ian's assessment that the primary flowrate from the heat pump is inadequate. I would suggest that you check all the valves on the...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Hi Everyone, It is strange how the same issues seem to pop up on the forum, it must be well over one year ago when CR and I were discussion the prob...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

That is precisely why when modelling heating systems, not just the heat pump data should be part of the overall equation. It is also necessary to inco...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

A simple remedy would be to re-pipe your buffer to make it into a volumiser in the return leg to the heat pump.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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