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SWA in U/F floor slab

whjohnson
Got a job where a new submain - approx 25 metre run in 16mm 3 core SWA. Embedded directly into a new concrete floor where wet U/F heating will be installed. Am trying to work out the best order of installation - that is, should the cable go in first, then the insulation, followed by the U/F pipework,and finally followed by the slab. Am not sure what order the u/f heating side will be installed and am also thinking about how if any correction factors may need to be applied for the current carrying capacity. I have sized the cable with a little overhead in mind in terms of actual final demand, but am still a little concerned about final slab operating temperature

Comments welcome.

PS - Am not liking this new format - it is like writing inside a letterbox when compiling posts!
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  • Former Community Member
    0 Former Community Member
    davidwalker2:

    My own UFH system is wet.  It comprises concrete slab, insulation, UFH tubing, engineered wood floor.  It is driven directly from a combi boiler, the boiler water i.e. the UFH water, cycles between 35 degrees C and 45 degrees C, the thermal inertia of the floor smooths this out and the floor is pleasantly warm to the foot, probably around 38 - 39 degrees.

     


    That's incredibly hot for UFH - BS EN 1264 Part 2 provide maximum foot comfort temperature of 29°C for living areas and 33°C for wet rooms


    OMS


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  • Former Community Member
    0 Former Community Member
    davidwalker2:

    My own UFH system is wet.  It comprises concrete slab, insulation, UFH tubing, engineered wood floor.  It is driven directly from a combi boiler, the boiler water i.e. the UFH water, cycles between 35 degrees C and 45 degrees C, the thermal inertia of the floor smooths this out and the floor is pleasantly warm to the foot, probably around 38 - 39 degrees.

     


    That's incredibly hot for UFH - BS EN 1264 Part 2 provide maximum foot comfort temperature of 29°C for living areas and 33°C for wet rooms


    OMS


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