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JamesPa

@jamespa

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Illustrious Member

Joined: Apr 3, 2023
Last seen: Nov 15, 2025

Topics: 18 / Replies: 3379

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RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

Your comments on insulation are well taken and fair, My comments, as I have said from time to time, relate to retrofits not new build. Older retrof...

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

You mean like happens with the current method! Actually in my case the next owner will almost certainly demolish the house but... its a fair arg...

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

Well I agree of course, Im hoping @heacol (or someone else from the industry) will comment!

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: Simulation of ASHP with Gas boiler as part of decision process

That sounds like a result to me!

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

Since we are talking about assumptions here, can I carry across the essence of the discussion going on in another thread which is - why don't we use m...

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: Simulation of ASHP with Gas boiler as part of decision process

Looks interesting, what are the axes as it looks like consumption goes up as temperature goes up, IE the wrong way round.

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: Simulation of ASHP with Gas boiler as part of decision process

With your 3kW house (lucky you!) its not surprising that solar gain has a major effect, but then nor does it matter too much if you oversize the heat ...

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: Simulation of ASHP with Gas boiler as part of decision process

I am. The assumptions were based on what you had said, were reasonable based on the limited information, and were necessary to explain the measured r...

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: Simulation of ASHP with Gas boiler as part of decision process

Yes, Yes, Yes. MCS admit that the current method is not entirely satisfactory, I have it in an email. But they say they 'dont have an alternative'....

1 year ago

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Air Source Heat Pumps (ASHPs)

RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

resistance is useless!

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Simulation of ASHP with Gas boiler as part of decision process

Three reasons I suspect: 1. I presume that the calculation assumes a room temp of 20/21 not 18.6. That does make a difference 2. Calculated heat ...

1 year ago

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