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GrahamF

@grahamf

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Joined: May 2, 2025
Last seen: Dec 3, 2025

Topics: 6 / Replies: 93

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RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

@ashp-bobba fascinating explanation, thanks. I have a physics degree and worked as an IT architect for 40 years, so I can understand this kind of sy...

2 months ago

Forum

Government Schemes, Regulations, Training, Planning & Organisations

RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

We should also consider the importance of the manufacturer's role in setting design guidelines for installers. As an example, Grant UK seem to reco...

2 months ago

Forum

Government Schemes, Regulations, Training, Planning & Organisations

RE: Sizing - Save me from my headache

If you have enough space, you might consider opting for a larger hot water cylinder. That would reduce the risk of running out of hot water. However...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Seeking Help for In-Principle Quote to fix a botched heat pump installation by Heat Geek Installer

@drei your proposed radiator design looks inadequate to me. The first and second floors look OK, but a shortfall of 59% on the ground floor at 45C is ...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

@editor like @jamespa, I had a list of test questions: What SCOP will you design for? Can you show me evidence of achieving that SCOP on your ins...

2 months ago

Forum

Government Schemes, Regulations, Training, Planning & Organisations

RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

@ashp-bobba I agree that as an installer you probably don’t want to be the cheapest. There is plenty of work out there. If you charge more, you can ...

2 months ago

Forum

Government Schemes, Regulations, Training, Planning & Organisations

RE: Seeking Help for In-Principle Quote to fix a botched heat pump installation by Heat Geek Installer

@drei in your original post, you said: Did the Heat Geek Elite engineer give you a design within the £800 fee, or did he just tell you everything t...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Why does an ASHP provide a more comfortable environment than a gas boiler?

@majordennisbloodnok I read the document that you shared: "Get_to_know_your_Cosy-20.2-internal". It looks as though it automatically adjusts the wea...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Why does an ASHP provide a more comfortable environment than a gas boiler?

@andrewj this is an interesting discussion. I am curious to understand why you are asking the question. You already have a heat pump, so surely you ...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Testing new controls/monitoring for Midea Clone ASHP

This really depends on your heat loss and emitters. My installer and I seem to have been too pessimistic about the heat loss and maybe overshot on ra...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Repiping and Reconfiguring our Heat Pump System Including Removing the Buffer Tank

@heacol thanks for explaining. We have FRVs on most radiators. We have TRVs in the bedrooms instead, but they are all wide open. The temperature i...

3 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: How to choose Towel Rails for an ASHP

@judith Yes I agree. They are extremely expensive. I suspect they sell very few of them, so they don’t have the economies of scale of standard rad...

3 months ago

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