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How many pumps on electric wet UFH?

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I am being told that wet UFH only needs one pump located on the UFH manifold and UFH circuits. 


My understanding is that it  needs two pumps, one for the boiler circuit and one for the UFH circuits as they are two distinct circuits. 


Seeing as you are all experts on circuit arrangements, tell me if the UFH manifold pump can circulate the water through the boiler without a boiler circuit pump installed?
Parents
  • The bypass could be a permanently connected radiator without a TRV, so it’s always hot when the system is in use.


    But suggesting having a permanently connected radiator in a flat with UFH will not be a suggestion that goes down well.
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  • The bypass could be a permanently connected radiator without a TRV, so it’s always hot when the system is in use.


    But suggesting having a permanently connected radiator in a flat with UFH will not be a suggestion that goes down well.
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