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Last seen: Nov 12, 2026
As you say you have to make assumptions about boiler efficiency, probably best based on boiler age and whether it actually condenses or not. Cooking...
That sounds quite high, but of course I dont know much about your house or how much DHW you use. My total January electricity consumption (minus 1 d...
@bobtskutter Thats about how I understand it. To simplify it down, as well as a loss from conduction (to the outside air) and ventilation, the vario...
I dont think so. Essentially with TRVs, smart or otherwise, bits of the the system are likely to be shutting down or opening up to control the room t...
Heat loss (and therefore the energy you need to supply) is proportional to (house temp - OAT). Note that the house continues to lose heat even if the...
Sorry for not explaining the graph. Each point represents one day. The horizontal axis is the degree-days figure for the day (degree-days is a sligh...
If the halo has an inbuilt temp sensor (which I imagine it does, but check) then you can leave the control unit in the loft. The latter, or e...
By 'flow' I presume you mean FSV parameter 2021. I am assuming you have left 2011 constant (at what value) As I mentioned earlier, consumption over...
I haven't used named ranges either more than a couple of times previously, but I found following the formulae with eg d23^d22*d2/2 difficult to follow...
You have answered your own question, at least in part In addition the pumps either side often aren't balanced properly so you get mixing, resulting i...
Unless its 'out of range' I dont think it materially affects COP (directly) which is why you wont see it plotted. The essentials of water flow are ...
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Degrees of Separation
Latest Posts
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@batpred The Daikin temperature probe protrudes from th...
By Toodles , 34 minutes ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
@editor And as an occasional contributor, may I say wel...
By Toodles , 3 hours ago
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RE: Should Households Who Can Afford It Pay More for Energy to Help Those Who Can't?
They don't have to try. Our entire system is d...
By EtchedPixels , 3 hours ago
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RE: Why don't people choose heat pumps?
Fair enough. I guess I was thinking of pipes that run ...
By JamesPa , 3 hours ago
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RE: How Can I Prove Coal Was My Main Heating Source Without Receipts?
Got excepted for the grant now so thanks for the replie...
By Chilli304 , 7 hours ago
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Daikin Altherma 3 R F+W, room thermostat control, weath...
By JanHarley , 8 hours ago
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RE: Buffer tank on a 2 x 14kw Ecodan system
Pretty much as I had guessed in my crude scaling from m...
By JamesPa , 11 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Well you have a vibration generator running at some fre...
By bobflux , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@downfield Thats a decent rate, I’m shocked they hadn...
By Papahuhu , 2 days ago
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RE: Adventures in heat loss calculations
@toodles thanks! So as suspected, around a doubling of ...
By SusannaSaunders , 2 days ago
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Six books in three years and I think I’ve now covered j...
By Mars , 2 days ago
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RE: Grant Aerona3 13kw - Buffer Tank - Heating Journey
@heymikey Well done in achieving as nearer a match acro...
By Toodles , 2 days ago
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Grant Aerona - Weather Compensation and Schedules
Im trying to set up a friends Grant Aerona. The WC curv...
By bontwoody , 3 days ago
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