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Last seen: Nov 11, 2026
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...
Weird that the Mitsubishi engineer says no. My (vaillant) sensor was specifically placed by my installer somewhere in permanent shade, with no chance...
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?
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...
How odd. Or maybe they have now realised that they are in a competition!
... Isn't great advertising! Or is that too cynical?
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...
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 ...
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...
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...
If they arent permanently open then yes they would cause a problem (unless they are all wired to close simultaneously when the DHW comes on - instead ...
Sofaik all others do the same, ie they operate the refrigerant circuit in cooling mode to effect defrost. They thus cool the house and warm the heat ...
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Degrees of Separation
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