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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Dec 19, 2025
Profile Activity
Topics: 5 / Replies: 503
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

@heatgeek I wouldn't normally comment on such a varied emitter scheme. I think I’m just trying to establish a few principles of HP operation in a simp...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

My first thoughts are that the process is more dynamic than your model suggests. Your idea that demand is determined by the house isn’t quite how I se...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

hi @jamespa Thanks for your reply. Thinking I can see a pretty good analogy and I will post it in the morning. 👍

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Yes I think That’s quoted quite a lot if I’m getting your ratio of 3 correctly. The problem is, like all rule of thumb approximations is that that man...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

My original post was as follows….

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Thanks for the nod James Hopefully my hand drawn “spreadsheets” are working now…. and the more detailed spreadsheet….. I hope the numbers are ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Thanks for the official documentation info @transparent . I hadn’t read the most recent offering…. Is it me or does it really avoid tying anything dow...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

not sure I agree… most of the sizing issues can be done at the design stage as a calc exercise. And as you and I have discussed previously… the design...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

With due regard for the title of this topic… This debate has been brewing for quite a few weeks now. It certainly asks some questions of the standar...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan 6kW - is it "cycling", or normal operation?

@clockworks while your sorting your wireless controller I have time to write a post on your rad capacity and the correct maths for sizing. So maybe l...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

Hi @clockworks Yes I sent you the charts which showed 3kw minimum output. I was very impressed when you managed to create the same hourly chart a...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

Hi @clockworks. I was just suggesting the one hour MELCloud graph so it’s more detailed. I think @gary could see what I was driving at.... the actua...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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