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Last seen: Nov 15, 2026
@susannasaunders I'll set this up and start monitoring from tomorrow... Nice! That is the way to go to get the highest quality estimate you can...
@susannasaunders Indeed, lots to think about there! Below, I'll try and fill a few gaps. Re: Radiators: yes if the radiator temperature is 35C, th...
I'm not overly concerned about the potential for really extreme events such as AMOC switching direction and plunging the UK into -20C winters. As othe...
Posted by: @scrchngwsl "Nothing in our country is designed for -20C. I can't think of a single aspect of my daily life that would operate comfortabl...
@etchedpixels I agree, the modelling can never be that accurate due to all manner of variations in build even between two ostensibly similar houses. ...
This info from the installer manual for Vaillant Aerotherm Plus shows the drop off in maximum output with very low temperatures. The lines are green 5...
@susannasaunders I can help you with some of the fundamental physics. Heat loss has a linear dependence on temperature difference according to the ...
The BUS grant funding for 2026/27 will run out at the current rate of uptake. Of the £400,000,000 allocated, only £143,585,000 was left at the end of ...
Posted by: @e-a-west Ideally I would prefer a complete package, ASHP, PV, battery etc, so that they all align. It might be worth taking a look...
@etchedpixels makes a very good point about the rural location and long cable runs likely driving a 16A limitation; I'd missed that. If the DNO also w...
@e-a-west Given that your new build is 144 sqm and that you might end up at about +33% worse than Passivhaus standards for heat loss, then that is jus...
our aim is to be near Passivhaus standards without the certification. Passivhaus standards are 15kWh/sq m/year of heating demand. Let's assume t...
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Latest Posts
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RE: Why don't people choose heat pumps?
By the same measure we should be insisting that all gas...
By Batpred , 3 hours ago
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RE: How quickly would you want/expect heat recovery to take from setback?
True but .. because the room is colder dt rad to room i...
By JamesPa , 3 hours ago
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Got two or three heat pump quotes that don’t agree? Post them here.
One of the biggest sources of confusion I see on Renewa...
By Mars , 3 hours ago
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RE: Load Shift and Lifestyle Shift Complete - our journey has ended, for now
I do not disagree with the concept of wanting to live a...
By Batpred , 4 hours ago
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RE: Buffer tank on a 2 x 14kw Ecodan system
@singlespeed I am going to put a temperature sensor on ...
By fosterl2 , 5 hours ago
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RE: Grant Aerona - Weather Compensation and Schedules
@taffonthetaff Yes, I have now gotten to the bottom of ...
By bontwoody , 6 hours ago
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RE: Grant R290 DHW Cycle Interuption
Occasionally our Grant R290 activates all three circuit...
By TaffontheTaff , 6 hours ago
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RE: Peak Energy Products V therm 16kW unit heat pump not reaching flow temperature
@davec 47kwh for 3 days is very low, compared to what I...
By johnd , 8 hours ago
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RE: Our 10 year old Grant heat pump failed
As I understand it it was working then stopped. More l...
By JamesPa , 12 hours ago
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@pipcart, Wattson is back... please go to the homepage ...
By Mars , 12 hours ago
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Do heat pump defrost cycles impair heat pump efficiency (COP values)?
The short answer is no, as far as I can see from data f...
By cathodeRay , 13 hours ago
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RE: Are We Sleepwalking Into Another Race to the Bottom?
That is a good approach and an excellent result. For co...
By Judith , 1 day ago
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