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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Nov 13, 2025
Profile Activity
Topics: 18 / Replies: 3358
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RE: Hitachi Yutaki M efficient operation

I dont know, unless water is circulating in the UFH much faster than its coming out of the heat pump so basically its going round and round the UFH be...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Hitachi Yutaki M efficient operation

@iraknic the buffer tank or pipe losses. It sounds like a classic case of excess mixing in the tank. That said not sure how accurate the or guns are...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP and how it should run and potential kw consumption?

@jeegnesh wow . exactly which rooms are too cold if you run at the 'downstairs' flow temperature.

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Totally bewildered with my ECO4 heat pump installation

The Vaillant WC interface is actually much more user friendly than most. You can do it without your installer (which doesnt excuse him not helping). ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP and how it should run and potential kw consumption?

I was saying The latter not the former - pick a heat curve suited for upstairs, but see my final comment below before and please respond you do anythi...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP and how it should run and potential kw consumption?

Its a complex system, probably over complex to be sensible and certainly too complex to work out what might happen with any certainty if you change op...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP and how it should run and potential kw consumption?

You could be right. What do you know of the design/history of the heating system (not the heat pump, the emitter system). Its quite bizarre that the...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How much radiator capacity do I need for an air source heat pump?

Agreed, Put another way it may sometimes be better to heat the house to a slightly higher temperature to avoid cycling. I can easily believe that is...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: ASHP and how it should run and potential kw consumption?

Im not surprised, two differnt heat curves will likely confuse it. I have only 1 and have turned off all autoadaption or room temp compensation and e...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Totally bewildered with my ECO4 heat pump installation

I can possibly help. First some explanations, then a comment then some more info needed from @jaynieq Explanations: kWh is energy, W is power...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: How much radiator capacity do I need for an air source heat pump?

Just for clarity my numbers, collected together, are: Design OAT: -2 Design FT @ -2: 45 Measured house loss @-2: 7kW Rated output of '7kW' Vail...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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