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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 16, 2025
Profile Activity
Topics: 17 / Replies: 2861
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RE: Suitability of 45C flow temp with existing pipework

The problem is you need to know what the existing pipework is, which by the sounds of it you cant without taking up some floorboards. Then the questi...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: The good, the bad and the not that great – my heat pump installation

Unfortunately MCS is funded and run by the industry. He who pays the piper and all that. My overwhelming impression, sadly, is that their guiding p...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized Vaillant ASHP and abandoned by installer

@jonathan Obviously this should be resolved for you by your supplier. However if it isn't for some reason it isn't, I wouldn't be too despondent. ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

Fair enough. They must have factored in an allowance for gas boiler efficiency. Definitely, which is why I favour using multiple metho...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

Fair enough. They must have factored in an allowance for gas boiler efficiency. Definitely, which is why I favour using multiple metho...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

I agree that this is not a particularly attractive method. However that doesn't justify relying on a method with known failings and ignoring other...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Simulation of ASHP with Gas boiler as part of decision process

As you can see there is furious disagreement (or healthy debate) going on, so I would suggest you read what everyone is saying and make an assessment ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

er.. just like the spreadsheet method! Hence why I am arguing for the consumption to be used as a sense check at least! er - just like an insta...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

It sounds like you pay more attention to the consequences of a sizing and think more about the design options than most of the muppets I encountered t...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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!

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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