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SUNandAIR
SUNandAIR
@sunandair
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Noble Member
Joined: Dec 30, 2022
Last seen: Jul 23, 2025
Profile Activity
Topics: 5 / Replies: 496
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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...

7 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...

7 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...

8 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...

8 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...

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

Thanks for the description @clockworks, that gives a better picture of your setup. I’m not sure if I’m interpreting your graphs properly but it appe...

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

@clockworks The wireless controller will modulate the HP and reduce output as the HP approaches the target room temp- but only when in Auto Adapt m...

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

The first thing I have seen in your graphs is that opening the TRVs has allowed the emitters to offload more heat, making your home somewhat warmer. I...

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

@clockworks can you confirm is the 900w you refer to consumption or is it output? If it’s consumption then that’s about right… assuming a cop of 3 whi...

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

thanks @gary I’ve just also explained that at 30c flow temps the output is even lower esp when you deduct the 2,5c mid temp of the emitters. all th...

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

Hi @clockworks I’ve just noticed @gary and I sent crossing messages at same time. I don’t want to overload you with too much information. So I’ll...

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

In principle, most heat pumps are over sized at some point. This usually occurs at the lowest demand and lowest outdoor temperature when we still need...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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