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SUNandAIR

@sunandair

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Joined: Dec 30, 2022
Last seen: Nov 2, 2025

Topics: 5 / Replies: 499

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RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

Logically, the lower frequency = more gentle, yes, but isn't the main wear/damaging issue here the stopping then restarting, and possibly the 'burst' ...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

@rhh2348 it’s clear you are wanting to run your heat pump at a low flow rate ie 30c. But you are also aware of some of the limitations of operating at...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan - is there actually such a thing as a 'minimum' flow temp to avoid cycling, and why if so?

So James I’m sure you might realis that my first 2 points were giveaway comments - ones that you couldn’t really object to. So your agreement is some...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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 ...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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 ...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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.?

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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 ...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Is your gut better than Math

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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...

7 months ago

Forum

Air Source Heat Pumps (ASHPs)

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...

8 months ago

Forum

Well & Truly Off The Grid

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.

8 months ago

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