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Last seen: Sep 12, 2026
My thought is simple. Bring it on and bring on plug in batteries asap as well. I think that the g98 position may mean that you can still have 1 p...
That's consistent with your heat loss calculation. You will end up with a 5 or 6kW heat pump. Cosy 6 if you go with octopus, probably the Vaillant ...
Good exercise. Obviously I have nothing to check it against but its very plausible. Do you have your current fuel consumption as a sense check? At...
When looking at 3-4kW houses its also worth bearing in mind that most manufacturers dont sell anything smaller than 5kW (sometimes they sell a heat pu...
@majordennisbloodnok @tomtheheatingengineer For my money both Heat Geek and Octopus have the advantage of volume. This provides them with real da...
There is scope for product development here. I for one don't want another ODU and another set of pipework around the house, even to just the two or t...
Nought for nought is the very best you can do, as soon as you try to get anything at all you get less because entropy continually increases. This is...
Really flow rate is a pipework limitation not a water pump limitation, you can always fit a pump with a greater head or a supplementary pump, but ther...
There is a thread on openenergymonitor which does suggest that the Vaillant Arotherm plus 7kW in particular doesn't deliver the (typically, depending ...
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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 , 8 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 , 11 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 , 15 hours ago
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RE: Is it the house or the equipment?
@majordennisbloodnok I do sympathise. On the original...
By springswood , 17 hours ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 21 hours ago
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Sorry to hear about the problems, its going to be somet...
By JamesPa , 22 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 , 2 days 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 , 2 days 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 , 3 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 , 4 days ago
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