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HughF
@hughf
Member
Noble Member
3009 kWhs
Joined: May 2, 2022
Last seen: Jan 29, 2025
Profile Activity
Topics: 6 / Replies: 481
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RE: Need ASHP advice for old (1882) stable development in SW Scotland - where do I begin?

@bontwoody indeed, although I would question the viability of having radiators that don't feel warm to the touch, from a homeowner acceptance perspect...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

It is my suspicion too, that in milder weather, we are simply oversized. I didn't take into consideration the possibility that the ACH value used in t...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Need ASHP advice for old (1882) stable development in SW Scotland - where do I begin?

@heacol SCOP only needs to be 2.8 to beat gas - and that's what it's all about... not costing more than a gas boiler.

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@jamespa flow temp.... get that accurate first, then tweak the WC curve up/down as required. Think I've got the curve vaguely correct at the moment, s...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@derek-m single heat pump, just run on weather comp, no stats, no setback. The Carel platform that my heat pump is built on allows full tuning of th...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

@jamespa I’ve spent ages tweaking the P, I, and D on mine to try and get a decent response without overshoot. It’s not easy, especially when 1. We’re ...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

On the subject of control strategy, some units can be set to control on LWT or RWT…. Mine used to be switchable between the two but a recent softwa...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Performance in the current cold snap…

GH has been involved in heat pump installs since the early days, he knows his stuff. He also had to come up with workarounds for flow rate issues that...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I’m sorry I can’t provide anything helpful, but I’m mighty glad I didn’t need a header or buffer in my install. It seems like a nightmare.

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Daikin problem

@bontwoody scop of 3.2 is certainly achievable, but not very easily on a retrofit unless you design for 45 degree flow, maximum. With octopus (for exa...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Cold Truth: Gender Dynamics in the World of Heat Pumps

Pretty much all of that is true for us…. I proposed the idea, my wife wanted a Combi as her friends had them. I stupidly designed for an indoor temp...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Real world advice on ASHP installation - 2 18kW ASHP's recommended

Blown bonded eps beads in that cavity, that’s definitely something you should do. are you active on buildhub?

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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