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Does anyone have experience with an RTL valve?

Discussion in 'Plumbing and Central Heating' started by casademont, 29 Jan 2018.

  1. casademont

    casademont

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    I want to put underfloor heating in a small ensuite (just 3.5 sqm).

    Having researched options (electric vs. wet), I found what seems like a good solution in using an RTL valve (return temperature limiter; https://www.floorheating-direct.co.uk/product/rtl-valve/). This solution just connects piping under the floor into the radiator flow and return, and limits the return temp preventing the floor from overheating. As I understand just like a lower temp radiator under the floor. Because it's a small area, it doesn't require a manifold or pump and runs on the existing system pressure.

    Does anyone have any experience with this / what results did you get? I plan to use 12mm pipe on a preformed cement board overlay with channels for the pipe 150mm apart, tiling on top. I want to do this in 3 small areas in total (on separate valves and loops; 2 ensuits, galley kitchen, all under 3.5 sqm).

    My system is a Combi Promax 28 HE Plus. I have 7 rads and 2 heated (wet) towel rails on this system; would it support this extra load?
     
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