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Setback savings - fact or fiction?

 
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Air Source Heat Pumps (ASHPs)
Last Post by SUNandAIR 3 hours ago
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SUNandAIR
 SUNandAIR
(@sunandair)
Noble Member Member
3387 kWhs
Joined: 2 years ago
Posts: 462
10/03/2025 10:07 am  

@cathoderay I see you are continuing to misquote from the thread below.

https://renewableheatinghub.co.uk/forums/postid/28542

What you are repeatedly failing to see is that my thread is about making a simple symmetrical comparison between energy used for several days at different OATs. The control is a target comfort temperature for a specified daytime period.

the trials were done using only the Mitsubishi generated data with no elaborate data gathering. Since I’m a firm believer that -

Information is not Knowledge  

Furthermore I have been mindful of the mixed level of understanding of the audience of these topics. And therefore of the need to keep a degree of succinct messaging. If you don’t like that then that’s fare enough you don’t have to read them. However you have chosen to mis quote and cast doubt indiscriminately on the outcome of someone else’s work.

in your replies you misquotes the number of 24/7 trials I had done for example.

you have repeatedly said there were no controls on comfort room temperatures when clearly there were.

here was the last scatter graph showing the last 24 hour consumption that you appear to have failed to have seen.

621B75BA 76D3 4654 A086 56AB2DEB897B

In this last 24 hour, operated HP period it was on a cold night and was below 3c getting colder. It was fully within our defrost temperature zone. This meant the HP operated through repeated defrost cycles. The results were unequivocal. The HP  used 9 kWh more energy during continuous night time operation than the several nights of the same OAT using the setback operation. 

The savings were especially high during sub 3c ambients. And since I was funding this trial then I felt my trial had run it’s course.

So in the space of 3 months (and only 3 pages of the topic thread) the trials had established clear trends of higher energy usage.

By comparison I note that your earlier thread “Do setbacks save energy without compromising comfort” it ran for 71 pages and 843 posts. It’s what prompted me to do a simpler study.

In the end we are homeowners helping each other out. Or at least that’s why I joined this forum.

 

 


   
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