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RobS
@robs
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Estimable Member
Joined: Oct 15, 2024
Last seen: May 5, 2026
Topics: 0 / Replies: 128
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RE: Best control strategies for heat pumps that are way oversized

A few Mitsubishi figures from their data book for comparison... 5kW output at 12C OAT: 5kW unit is COP of 6.15 11.2kW unit is COP of 5.9 ...

1 year ago
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RE: Samsung Gen7 setup

To quantify the greater pressure drop of your corrugated pipe you could try using an online calculator like For example, at 20 l/min a 25.4mm corrug...

2 years ago
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RE: Minimum ASHP outputs?

Yes, your figures correlate well with your heat pump having a minimum output of about 3kW at these outside temperatures. Have you tried your heat pump...

2 years ago
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RE: Minimum ASHP outputs?

You have clearly found your system's sweet spot! Yes, radiator based systems are likely to be limited in stable low flow temperatures. But larg...

2 years ago
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RE: Minimum ASHP outputs?

I'm pretty sure it just means output, using the word capacity in this way isn't unusual in Japanese documents (and if something has a capacity then it...

2 years ago
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RE: Minimum ASPH outputs?

As far as I know yes.

2 years ago
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RE: Minimum ASPH outputs?

@johnmo The effect of cycling is very different with different heating systems too. If modulation was not an important factor heat pumps would still...

2 years ago
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RE: Minimum ASPH outputs?

@tomasmcguinness Mitsubishi's figures are in(I'd suggest downloading it and reading it offline as it's a 400+ page PDF). For their new R290 ASHPs se...

2 years ago
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