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Last seen: Aug 17, 2026
I concur in principle with @old_scientist however there are some points to consider 1. your house has a heat input other than the heating, due to wa...
Its good to hear that you are pleased with the outcome. I agree with @old_scientist that cycling is to be expected (and is unavoidable) in milder tem...
That needs investigation. Its currently mild so you can do things that you cant do when its cold. Turn the ASHP off completely for 3 hours (preferab...
The spec for your model calls for a total of 39l for 'cooler climates'. I think we are in the 'warmer climate' region according to the relevant EU di...
Im going to cut to the chase. From all you have said, my guess is that you have an 8.5kW pump in a 4-6kW house controlled by thermostats (I thi...
I presume the diverter valve then, which would make sense. As you say you would expect this to be on the inlet to the BT
Is it a 2 way valve or a 3 way diverter valve. Normally the (3 way) diverter valve is the only motorised valve needed. As you say taking some tempe...
@davidnolan22 I will continue to think about this. We could do with a comment from @bobtskutter on the pump arrangement , he is good on the hydron...
Fundamentally emitter output increases with flow temperature. Once the system has got to the point where flow temperature is such that the emitters a...
if 38 at -3 is specified as an end point on the curve, the target temp will never go above 38. If however you shut zones down then it may overshoot b...
OK nothing obvious here so more questions Im afraid What controls the pumps Are you sure that the secondary remains open (and pumped) during d...
I got several quotes like this for a (on the face of it) similar season. I also got two quotes of 5K + BUS grant, from the installers I anyway trust...
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