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scrchngwsl
@scrchngwsl
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Joined: Oct 26, 2022
Last seen: Jul 19, 2025
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Topics: 4 / Replies: 87
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RE: Do setbacks save energy without compromising comfort?

@cathoderay I did some maths over my lunchbreak and I think I've got an explanation for why there is a polynomial in the relationship. I think it is...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

I also found other forms of the curve that better fit the data when doing my EDA, many of which confused the hell out of me, including the polynomial ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

@cathoderay I've made a few modifications having looked through your posts. First, the problem with applying the "no setback" model to the "yes setb...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

So I did a quick model in R on the hourly data, and I found that the setback period used 1% less electricity than the model suggests would have been u...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

This is absolutely the right question to ask, and then to follow up - so what should your should your strategy be for raising and lowering the set tem...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Cosy Octopus and heat pump settings

You could try increasing the tank target temperature so that, even if it's 3C below and doesn't trigger, it's still hot enough for long enough to supp...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Cosy Octopus and heat pump settings

I'm on Intelligent rather than Cosy, but I have automated my heat pump to boost the flow temp by 5C during the cheap period. I don't think it's game c...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

It's also 2.4kWh extra heat generated in your home (assuming the circulating pumps are inside the thermal envelope of your home).

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

If we're getting R-squareds of 0.9 with just the OAT vs energy consumed, then we're probably not going to be able to discern a 5-10% difference in ene...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Optimising ecodan ASHP

This was my experience too, and our installers removed the FTC6 and replaced it with an FTC5. Otherwise, I believe, you have to invest in the dedicate...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

@jamespa I think it is better to measure energy consumed of course, but then you also need to take into account things like Time of Use tariffs. For e...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Do setbacks save energy without compromising comfort?

There's really no meaningful difference between those two lines at all. People can set their setbacks if they want and not worry about it, or people c...

2 years ago
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Air Source Heat Pumps (ASHPs)
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