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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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Reply
RE: What do we need to know before installing a heat pump?

@jamespa Using degree days for calculations with gas or oil boilers is not really a problem, but such does not work particularly well with ASHP's.

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Replacing a gas boiler with a heat pump is "irrational"

Germany appears to be working towards having green Hydrogen as a key element of their energy mix. Below are some interesting videos and information.

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Mitsubishi Ecodan & Raspberry Pi automations

The graphs that you obtained are typical of a control system whose response is actually slightly too responsive. I will formulate an explanation in a ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: DIY Heat Pumps.

I suppose that you could try the old fashioned method, download and read the installation manual. There are a number of you tube video's. I don't ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

@fazel That's because we live in 'rip-off Britain'. 😡

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

@jamespa It is my understanding that air conditioning units (A2A heat pumps) have the same limitations for permitted development as A2W heat pumps, ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

I suppose the noise aspect is very much a 'can of worms' and also subjective, since different individuals will have varying levels of noise tolerance....

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Weather compensation and air source heat pumps

@editor If you would like to provide the readings from your system I will try to analyse the data and see if there may be a problem somewhere.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Weather compensation and air source heat pumps

@editor Looking at the graph, not only is the expected change is LWT lower at higher outside temperatures, you may also have the case where it runs ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Weather compensation and air source heat pumps

@editor If you are not seeing a change in LWT with outside temperature, then I would question whether your system is operating in WC mode, or that t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan & Raspberry Pi automations

@sunandair This is the way that I interpret the reply from the Mitsubishi Engineer. The controller measures both the outside temperature and the i...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

Hi James, To give credence to some of your suggestions, below is what we have achieved over the past 10 years or so, and what could be achieved by o...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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