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Kitchen Island Supply.

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What are viewers' opinions of the best type of underfloor cable to use for a kitchen island where the floor has wet underfloor heating?

What depth is best for the cable?

What distance from any heating pipes?

Answers on a postcard please to: Arthur Iggins, c/o Bert's Turf Accounts, 19, Balls Pond Road, Wigan. (Next to horse meat shop.)

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    Will the floor pipes get as hot as radiator pipes

    UFH runs at a lot lower temperature than radiator circuits - mine's set at around 40ºC - compared with 60-80ºC for rad circuits. Where a boiler (or other heat source) can run hotter than the UFH wants, it's usual for the UFH circuit to be fed though a thermostatic blending valve and its own pump (effectively the pump re-cycles the water from its own UFH circuit, only drawing a little of the 'hot' water from the boiler circuit as the through the blending valve as temperature drops). It may be higher than 40ºC under a solid floor if the building isn't well insulated - there should be some design calculations for the UFH which should give you an idea of your particular situation.

    or will there be a separate "floor sensor/thermostat"?

    Normally each room has its own thermostat, which then control the flow through the UFH pipes in that room via a manifold. In effect similar to having a thermosatic radiator valve, but somewhat better at sensing the real room temperature rather than the temperature right next to the rad.

        - Andy.

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  • 0

    Will the floor pipes get as hot as radiator pipes

    UFH runs at a lot lower temperature than radiator circuits - mine's set at around 40ºC - compared with 60-80ºC for rad circuits. Where a boiler (or other heat source) can run hotter than the UFH wants, it's usual for the UFH circuit to be fed though a thermostatic blending valve and its own pump (effectively the pump re-cycles the water from its own UFH circuit, only drawing a little of the 'hot' water from the boiler circuit as the through the blending valve as temperature drops). It may be higher than 40ºC under a solid floor if the building isn't well insulated - there should be some design calculations for the UFH which should give you an idea of your particular situation.

    or will there be a separate "floor sensor/thermostat"?

    Normally each room has its own thermostat, which then control the flow through the UFH pipes in that room via a manifold. In effect similar to having a thermosatic radiator valve, but somewhat better at sensing the real room temperature rather than the temperature right next to the rad.

        - Andy.

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