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Last seen: Oct 23, 2026
Unless the IAT was in fact 19 when you did the energy vs OAT curve, we need to correct for that!
It looked bigger on the charts you posted recently, perhaps more like 2-3 C The difference does make a fair difference to some of the calculations p...
This confuses me. Do I correctly recall that your heat pump (and more importantly OAT sensor) is in a bit of a well so the OAT sensor doesn't measure...
Can you please clarify what this graph is, it appears to have both setback and no setback on the same days? Also when you did the AUC calculation re...
Yes and Yes. Conservation of energy must eventually apply, but may take a long while for equilibrium to be re-attained, and my suspiscion is that in ...
The '10%' refers to the change in deltaT between IAT (20C->19C) and OAT (10C). House loss (which is how the '10%' is being used) is proportional ...
Provided the 'control' period from which these were derived is representative of the test period I would agree. If any changes have been made to the ...
Dare I say 'builders innit' (i think that's the appropriate slang - but its not my specialist subject!). The electrical institutions, in fairness, h...
True (which is one reason I advocate it for pump sizing), but it doesn't support extrapolation to other scenarios (ie houses) unless you have enough e...
The conclusion is right but just to correct the units - you have a 10kWh battery and it charges at about 2.1kW. Think of kW like speed and kWh like ...
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Latest Posts
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RE: How will removing the standing charge on gas bills benefit heat pumps?
I'm not sure it makes much of a difference to heat-pump...
By Temperature_Gradient , 2 minutes ago
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@editor Ouch, sorry to re start the tick. I had assume...
By DavidB , 46 minutes ago
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 2 hours ago
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RE: New Build 3 Phase or 1Phase
We are on three phase power because it's an enormous li...
By EtchedPixels , 2 hours ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
By EtchedPixels , 11 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
By Indevolt Tech , 19 hours ago
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RE: Double or Triple Glazed Windows?
Posted by: @singlespeed With 9 years repairing windo...
By Rob of York , 1 day ago
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@transparent we’re still running a secure version of PH...
By Mars , 2 days ago
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RE: How quickly would you want/expect heat recovery to take from setback?
Much longer than that here. The heating isn't even on. ...
By bobflux , 2 days ago
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RE: Passiv Smart Thermostat - Help & Forum Support
Obviously the weather is changeable but there's a defin...
By Singlespeed , 2 days ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@rob-of-york I must admit that when we had a Daikin hea...
By Toodles , 2 days ago
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RE: Forum updates, announcements & issues
Get the Renewable Heating Hub heads-up on WhatsApp. I...
By Mars , 2 days ago
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RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
@editor I pointed out to the one of the Fuse execs that...
By dansus , 2 days ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews As well as loft insulation, there are othe...
By Rob of York , 2 days ago
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