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Last seen: Nov 12, 2026
Yes, sorry for any confusion. 10C is sometimes quoted as the temp of incoming mains (being, I presume, roughly the temp underground at the level the ...
another is to fit waste water heat recovery
OK lets go with 6, 8 minute showers at 10l/min. So you need 480l of water at 40C. If you start of with 300l at 48C (a common setting) and mix it wit...
Any heating set up with either variable or low flow temperature does this. In the UK we normally set up boilers to run at a high fixed flow temperatu...
We need to do some energy calculations! Over what period do you need 8 showers and do you know the water flow rate even roughly. We need these numbe...
The ASHP, just like a boiler, can supply water at only one temperature at any time. So it switches between space heating and DHW. There will be one ...
@mars That could be a whole discussion in itself. I don't personally think its simple!
Unless you have a time of use tarriff/economy 7 then the most economical way to heat DHW is when its warmest outside, generally mid afternoon. Howeve...
It can do provided that doing so doesn't exceed the maximum possible output power. That's the basic limitation which it can't circumvent. Your 8.5kW...
In general terms most heat pumps have this kind of characteristic unless output is capped in the firmware to flatten the curve artificially. Do ...
at 8.5p per kWh its probably not worth spending too much time optimising for efficiency unless you want to enter into the top of the SCOPs competition...
Welcome. Firstly looking at individual days is essentially useless, houses have a 'memory' so you can really only make meaningful 'measurements' seve...
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Latest Posts
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Should I change my cylinder when changing from a gas boiler to a heat pump.
I have 178 L Gledhill unvented cylinder which was fitte...
By David , 3 hours ago
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Should I change my cylinder when changing from a gas boiler to a heat pump.
I have 178 L Gledhill unvented cylinder which was fitte...
By David , 3 hours ago
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RE: Plug and play solar. Thoughts?
Impressions so far from the one I've installed are that...
By EtchedPixels , 4 hours ago
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@batpred The Daikin temperature probe protrudes from th...
By Toodles , 7 hours 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 , 9 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 , 10 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 , 10 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 , 14 hours ago
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Daikin Altherma 3 R F+W, room thermostat control, weath...
By JanHarley , 15 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 , 18 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...
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RE: Adventures in heat loss calculations
@toodles thanks! So as suspected, around a doubling of ...
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