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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 15, 2025
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Topics: 17 / Replies: 2852
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RE: Balancing a low loss header/buffer tank on a Grant Aerona 2 13kw r32 system

Can you clarify. Do you mean 1300kWh and is this electricity in or heat out? For UFH that's completely ridiculous (as you obviously realise)...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

I think you (for the avoidance of doubt by you I mean @tasos) may be misunderstanding what variable the inverter reacts to. It changes the energy del...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

Maybe, or maybe (depending on the system) you need a differential component also, which is why PID controllers are a thing. And maybe you want to tak...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

... which is precisely how it achieves cost savings, by playing with LWT in response to OAT, predicted OAT, quite possibly predicted solar gain and wi...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Balancing a low loss header/buffer tank on a Grant Aerona 2 13kw r32 system

OK got you. Thats how a buffer should, ideally, be run. I know of two basic techniques - 1. Adjust pump speeds (somehow) so the flow rates in an...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

Adaptive, in this case, means a mode which adapts its behaviour, over a period of time (days), to the house (basically it learns about the house chara...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

True, but that neither circumvents the thermodynamics not the comfort factors described above. That depends on the thermostat. If it is an exter...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Balancing a low loss header/buffer tank on a Grant Aerona 2 13kw r32 system

Can you clarify what the problem is that you are trying to solve by balancing, whats the objective/currently 'broken'. As an aside (or perhaps not) s...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea ASHP – how to set weather compensation

Weather compensation is really important for heat pumps and, correctly adjusted, will save you between 10-20% (or in some circumstances more) in runni...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan help - flow temperature spikes when operating in weather compensation mode

That's reassuring. Hopefully it would have returned to space heating if there demand was there.

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

I agree with your conclusions and I agree with the above. If they try to argue its your system, you have a heat exchanger which they presumably insta...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan help - flow temperature spikes when operating in weather compensation mode

Presumably it stops heating when the DHW reaches temperature, so if it only needs 30 mins then it will only take 30mins and then return to space heati...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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