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JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Aug 12, 2025
Profile Activity
Topics: 17 / Replies: 2685
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RE: Ecodan - Auto Adapt

... but suspicious it correlates with it getting shaded. 11C isnt particularly surprising. Hopefully its white in colour, if it were black it could ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

On other threads people complain about gurgling, which is due to dissolved air coming out of solution during the first couple of weeks. It took nearl...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

A header (or low loss header - LLH) can be identified because flow from HP and flow to emitters and return from emitters and return to HP al...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - Auto Adapt

Weird that the Mitsubishi engineer says no. My (vaillant) sensor was specifically placed by my installer somewhere in permanent shade, with no chance...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

I thought that but it seems to go to the UFH not the DHW and it should still be warm assuming its from the return, so surely one would insulate it?

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

I have been trying to work that out from the photos. Still not sure, but like you I suspect that there may be one and it might account for a 10%+ eff...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Anyone able to provide some feedback before I make my finale decision? Samsung vs Baxi vs Vaillant

How odd. Or maybe they have now realised that they are in a competition!

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

... Isn't great advertising! Or is that too cynical?

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Honestly no idea. The simple thermodynamics say that lower DT is always better. I have not heard a coherent explanation why we design for DT 5 not...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

Good I guess these operate the actuators on each loop but maybe one on each manifold operates the zone valve? If tyhere is nothing else to set high ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?

No, that wouldn't account for the flow temp being lower than the return temp. This shows that the water pump continues to operate and as a result the...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

I think what will actually happen is that the deltaT from flow to return will decrease. There may be a slight increase in energy to the house (becaus...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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