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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 11, 2026
Profile Activity
Topics: 20 / Replies: 3890
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Reply
RE: Never mind the OAT…

Which is one reason why I now talk about the economic security argument for renewables. There are a group of people, who may not environmentally tune...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Setback savings - fact or fiction?

I completely agree, just sounding a note of caution! I cant think of a reason why it would matter but, that said, when I did something similar (I...

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

Somehow Google matches images, but I suspect the techniques are quite sophisticated. Building on @majordennisbloodnok suggestion could it be as simp...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Never mind the OAT…

I think you are right. However in this case, in the UK, the money argument and the environmental argument are in perfect alignment in the medium/long...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Never mind the OAT…

People apparently, at least according to the polls, say it is if asked, but dont act that way. Im increasingly coming to the conclusion that energy...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Speedcomfort radiator fans

Thats true, but having tried (and succeeded) in constructing a DiY version with computer fans, I can still appreciate the good design of the speedcomf...

3 weeks ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Never mind the OAT…

Didn't with my boiler, too much temperature variation with both time and place. However I do grant that, had it featured weather compensation and l...

3 weeks ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Grant Aerona: Is there a setting to keep the 2-port valve open during pump blockade

Depends on OAT. Mine cycles at OAT>10 and of course has periodic defrosts at OAT<4. Steady operation typically occurs between 4 and 10. This ...

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

Well of course I agree. There is a small saving in energy that you need to deliver to the house as a result of setback, which reduces the average hou...

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

OK but the lower average IAT is precisely why some saving might be expected. So the answer to the question you pose d is in theory yes.  

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Grant Aerona: Is there a setting to keep the 2-port valve open during pump blockade

@rhiannon Welcome to the forums and feel free to ask any questions. The best way to run almost any heat pump is 24x7 with any thermostat set to say ...

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

Er dont you expect the mean 24hr temp to be lower on setback days. Thats sort of the point. The mean of interest is surely the mean IAT during the h...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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