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Last seen: Sep 19, 2024
@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.
Germany appears to be working towards having green Hydrogen as a key element of their energy mix. Below are some interesting videos and information.
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 ...
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 ...
@fazel That's because we live in 'rip-off Britain'. 😡
@jamespa It is my understanding that air conditioning units (A2A heat pumps) have the same limitations for permitted development as A2W heat pumps, ...
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....
@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.
@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 ...
@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...
@sunandair This is the way that I interpret the reply from the Mitsubishi Engineer. The controller measures both the outside temperature and the i...
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...
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Degrees of Separation
Latest Posts
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This has turned into a fascinating little rabbit hole. ...
By Mars , 7 hours ago
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RE: Adventures in heat loss calculations
yes and no. apparently HG’s AI was automatically assumi...
By Batpred , 7 hours ago
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RE: Switch suitable to change between two inverter CT's
Last winter my battery ,32KWh, could run the house com...
By Jancold , 8 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@rob-of-york Thank you for that, whilst familiar with t...
By kilgorexv , 8 hours ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Agree with Major. And even if I was very happy with ...
By Batpred , 9 hours ago
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RE: Is the "divide by 2900" rule still valid?
There is another estimator that you could use, a formul...
By Rob of York , 12 hours ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 4 days ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 4 days ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 4 days ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 4 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 5 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 5 days ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
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