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Last seen: Sep 12, 2026
Yes from first principles. The temperature profile in any given location is well known and fairly consistent (averaged over a season) from year to y...
To clarify - the generally accepted divisor for SE England is ~2900 which is scientifically derived from a degree day calculation based on the SE UK t...
Surely the drops to the radiators are in parallel not in series, so the index circuit for pressure drop calculations will be determined by the longest...
I have one Mitsubishi Ilife2-slim fancoil to solve a problem that otherwise would have required either a large K3 or a superlarge K2. Its really quit...
@tomasmcguinness Has it changed colour between photos or is that just the evening light?
@ian33a Given the nature of your house I think you did well to get estimates that close. I have to agree with this sentiment: and also The...
Mine does the same, but recordw is only about 6kWh/month. I assume its a combination of quiescent power consumption, some of the things it does reg...
I can imagine 'get outs' but doubt they will use them. Heat Geek do appear to be 'industry leading' in offering this guarantee, and everything we hea...
Quite probably, does the guarantee come with any definitions of terms Quite possibly yes, albeit perhaps surprisingly. Here is a plot f...
Good but - with your recirculating pump a high proportion of our DHW consumption is actually heating the house! Best to bear that in mind!
@cathoderay if I could give two thumbs up for that post I would. However pressing the thumbs up a second time deletes the first. I concede that this...
I would agree with this if it were not for the material discrepancy with this graph (the flattening off of which at low temperatures can be explained ...
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Degrees of Separation
Latest Posts
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RE: Siting of the external sensor on a heatpump
I agree. However I would also (primarily) expect that ...
By JamesPa , 5 hours ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
You should (almost) always reject having a buffer, by w...
By JamesPa , 8 hours ago
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RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 12 hours ago
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RE: Is it the house or the equipment?
@majordennisbloodnok I do sympathise. On the original...
By springswood , 14 hours ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 18 hours ago
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Sorry to hear about the problems, its going to be somet...
By JamesPa , 19 hours ago
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
By bobflux , 1 day ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
By cathodeRay , 1 day ago
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RE: Vaillant Arotherm Plus 7KW need a service on it
booked it with Vaillant. will use them until i can find...
By AdamK , 1 day ago
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RE: Adventures in heat loss calculations
I have seen it stated that the declared calorific value...
By JamesPa , 2 days ago
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RE: Two heating zones to one zone
@transparent Many thanks. The garage is fairly well ...
By Profzarkov , 2 days ago
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RE: Vaillant Aurotherm - Heater Wire Position
Ah, good point. I need to check if this was installed i...
By Batpred , 3 days ago
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@batpred thanks for getting a copy. Appreciate the supp...
By Mars , 3 days ago
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RE: Tell us about your Solar (PV) setup
We have a 6.56kW solar PV system (16x 410W panels) inst...
By Rob of York , 3 days ago
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