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RobS
@robs
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Joined: Oct 15, 2024
Last seen: Jun 14, 2026
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Topics: 0 / Replies: 134
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RE: Setback savings - fact or fiction?

To quote myself from a pervious post: "it's temperature sensors are thermistors with +/- 0.5C accuracy so at a dT of 5C can introduce a +/- 20% inac...

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

The FTC7 controller we have has configuration settings for pump power consumption values: Our settings have 39W for pump 1, as that's the power co...

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

Here's a couple of examples:     10.7 kWh estimated vs 7.3 kWh actual => 46.6%   12.1 kWh estimated vs 7.6 kWh ac...

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

Hi @majordennisbloodnok As per your second post, yes I'm referring to Open Energy Monitor and not Original Equipment Manufacturer. I also have Phil...

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

Some of the moderators of this forum post data from OEM, so I'm not the only one doing that. Other forum contributors have also stated that they own O...

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

So if "the compressor is already working at a high enough compression" then there is no additional electrical energy required to perform the defrost. ...

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

You said "this chart says I missed 7 defrosts during my setback saving oodles of cash compared to operating it 24/7." clearly implying that missing 7 ...

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

Except there's little evidence that defrosts use a significant amount of extra electricity.  

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

I was replying to a post with no content relating to my analysis. When I posted my analysis of one of our system's defrosts I didn't say it was rep...

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

Thanks for posting my images again, the OAT in each of these examples was -1.5C. They were posted to show the differences and similarities in approach...

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

Of course I have mentioned the OEM heat pump monitoring system that I have, doing so gives context to what I write. I have posted links to OEM's websi...

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

Reassess my energy review? So the following quote fromisn't a reassessment? "...some of that heat (warm water) will be used by the defrost process (...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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