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RobS
@robs
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Estimable Member
Joined: Oct 15, 2024
Last seen: May 5, 2026
Profile Activity
Topics: 0 / Replies: 128
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RE: Setback savings - fact or fiction?

I answered that days back, I even provided a summary of my answer (reproduced below).   So the two similar days with setbacks would be expect...

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

I changed the pump power to the actual value to see if the energy consumption estimate improved but it is still woefully inaccurate. As I have an accu...

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

I posted an image from the FTC6 installer manual that clearly shows per pump power settings (like our FTC7) and a perfectly reasonable assumption of "...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice needed after a successful "leftfield" experiment.....

@pauli For the conventional approach, have you considered the 4kW Grant R290 heat pump? The specs say that it can modulate down to 1.25kW output (s...

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

The answer was in two parts in my reply, the second part that also answered some of your other points was: "If you effectively eliminate the over re...

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

Can I ask where the 2.8kWh figure comes from? I checked the FTC6 manual and it has the same settings for pump power as the FTC7 (see below from the FT...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

2 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...

2 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...

2 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...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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. ...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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