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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 26, 2025
Topics: 16 / Replies: 2638
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RE: Help me keep the faith with my air source heat pump installation

If it's running on WC then at night it's quite likely to heat up. The outdoors gets quite cold at night! Likewise circulator pump is likely to con...

1 month ago
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RE: Flow Rate & Low Loss Headers

@morganr I have been thinking some more about those WC curves. Fundamentally they are, so far as I can see, just wrong. If your aim is to run on pur...

1 month ago
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RE: Air Changes per Hour - ACH and the MCS requirement

It's a good question. With a house that has sufficient heat capacity (eg one with ufh in a slab) batch heating at cheap rate is probably a good app...

1 month ago
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RE: Flow Rate & Low Loss Headers

It sounds like you have thought about this a lot and everything you are saying looks sensible. A windowless, doorless gable with no properties nearby...

1 month ago
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RE: Remaining hot water/hot water flow meter

I think you first sentence is spot on, stored DHW is just different to on tap DHW from (presumably) a combi. Not worse, not better, just different. ...

1 month ago
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RE: I don't need any heating in the summer. How do I turn my Samsung heat pump off?

I should perhaps clarify my thoughts in view of the comments from @old_scientist (with whom I agree). @quakerquaker asked 'Q1 - is maintaining the w...

1 month ago
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RE: Remaining hot water/hot water flow meter

Rainfall showers can be 20l/min and stored water at mains pressure/3bar generally flows faster (possibly a lot faster) than anything coming out of a c...

1 month ago
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RE: Flow Rate & Low Loss Headers

tricky that, I cant say I have a solution. Fair enough. Its all a bit crazy IMHO. You can have a 13kg bottle of propane in a garage or on...

1 month ago
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RE: Air Changes per Hour - ACH and the MCS requirement

@ashp-bobba Talking of over-sizing (and if you dont mind me asking) what do you suggest for a load such as 3-4kW. There is another thread where this...

1 month ago
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