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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Jul 23, 2025
Profile Activity
Topics: 5 / Replies: 496
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Reply
RE: Performance of Heat Pumps in Mild Weather

@trebor12345 it should be possible to work out the (nominal) input from the data provided since it has COP and output data. The chart would suggest ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Hi, This set of comments all appear to be set in theory rather than making specific answers. for instance when you say “lower flow temperature and ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Aren't you potentially confusing two things here. OP could of course increase rad size/ volume and reduce ft but that won't change the minimum output...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

@jamespa not sure what you mean… is that a theoretical comment or a comment from experience.?

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

First thought is that cycling is a designed in process. And Mitsubishi appears to to have a 20 minute minimum run time for normal operation with 3 to ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is your gut better than Math

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Performance of Heat Pumps in Mild Weather

Great discussion @heatgeek and @robs. Nice and simple language and clarity of a complex topic. For me it’s all about the specifics with no, or limited...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Jokes and fun posts about heat pumps and renewables

“Don’t bother with solar DHW auto cool-down in March….” They said. ”It’ll never get too hot ‘caus the sun is too low…..!?” oops - another few da...

5 months ago
Forum
Well & Truly Off The Grid
Reply
RE: Renewable Heating Hub Partners with Heat Geek

@editor… this sounds like a huge undertaking with a great service. best of luck with this new venture.

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Auto Adapt Questions

Hi @richard24738 we weren’t happy with our FTC Controller being installed in our cylinder cupboard. The ftc controller is supplied with a single ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Possibly 40c vs 30c flow has something to do with it…. Inevitably temp is what melts quicker. But what the graphs seem to show is both our Flow temps ...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Good call on the need for a beer.. that’s exactly what I did. As you say, your system appears to have plenty of emitter capacity for your HP size...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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