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Last seen: Oct 21, 2026
Can I ask what triggered you to do this. Did it change the house temperature? (No implied criticism, just trying to find out a bit of the background...
Not much to discuss based on that, the experiment seems to match what one would expect from a bit of logic (Yay!)
My strong gut feel is that, if you bypass the pump in the secondary, turn the thermostat up to full, bypass the buffer, it will work. Basically the h...
Thats not directly relevant because you are comparing real time heating with stored hot water. Real time heating is dominated by the raw power you ca...
I guess that depends on where you measure it. If measured at the heat pump then the flow rate for any given heat transfer at any given deltaT (across...
Typically DHW tanks are cylindrical and ~1.4m high (or more) Is the loft a possibility? If not then with the relatively small space available you ...
@transparent I dont disagree in principle but ... in the real world where time is money and the customer doesnt want to pay the latter existing ca...
For what its worth I had exactly the same experience with my Vaillant heat pump and have settled on operating in pure WC mode. One of the challenges...
I read the post you referenced and Im not wuite sure what the question you are trying to answer is. If its this "In summary, if I had the choice...
I think your argument is based on the relatively unusual case of a very low loss house with a large slab/UFH operating at a low flow temperature. The...
Thats fair. Essentially all the controller needs to do is adjust target flow temperature (or possibly the WC curve so that the heat pump is left to a...
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