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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: May 20, 2026
Profile Activity
Topics: 18 / Replies: 2910
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RE: Forum updates, announcements & issues

@editor — got it!

19 hours ago
Forum
Introductions, Forum Rules & Updates
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RE: Setback savings - fact or fiction?

I too agree with what you say, and am grateful to you for looking into it. Fair enough! I sometimes do the same thing include something not aimed...

4 days ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

@jamespa — thanks. No rush, I posted a bit too hastily earlier and need to correct the plot once I realised it was not correct! This may also be a r...

5 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Setback savings - fact or fiction?

I can get both the fitted values, which are row specific ie depend on the OAT (ambient) value for that row, so in effect they are random, or the regre...

5 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Setback savings - fact or fiction?

Short of watermarking every post and every chart with 'N=1' there isn't much more I can do than I already have done, point out regularly that this is ...

5 days ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

Nonetheless, useful commentary in that it tells us 'smart' meters are not so much about letting consumers know much about their consumption — wasn't t...

5 days ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

@transparent may have something useful to add here, he knows a lot about smart meters. My initial thought is do you actually need this level of ...

5 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Estimating true heat loss from twelve months of consumption data

@ian33a — I have a sort of residual interest in this problem as I used to have an oil tank (and boiler) and I remember how vague my usage measurements...

5 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Setback savings - fact or fiction?

I agree, and that is in effect what @jamespa and I have been doing! That's for the link and it seems I have been teaching grandmothers to suck eg...

6 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Estimating true heat loss from twelve months of consumption data

@ian33a — a measured heat loss always trumps a calculated (whatiffery spreadsheet) heat loss, providing certain requirements are met. Firstly, the I...

6 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Setback savings - fact or fiction?

Yes, see below. They are just standard regression lines, just as in any spreadsheet, but in R you have more control and more options, but as I have sa...

6 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Estimating true heat loss from twelve months of consumption data

Using past oil usage to estimate heat loss is tricky. Firstly it is very unusual to have accurate interval usage. You fills your tank and runs your ...

6 days ago
Forum
Air Source Heat Pumps (ASHPs)
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