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what temp water for underfloor heating?

  • 11-03-2010 9:21pm
    #1
    mountain
    Registered Users, Registered Users 2 Posts: 2,418 ✭✭✭


    Had an extension put on our house last year, underfloor heating in that section,
    rads in rest of house. Plumber put in new oil condenser boiler to run both.
    Last week had a different plumber in house, and he said that the same temp water for rads is being used for the underfloor ie. 60 degree, warned me that is far too high, and also means a high usage of oil, (we have used €450 in the past 2 months), he reckons that the water for the underfloor should be 40 degree, and suggests putting a "valve" in to acheive this.

    Is he right?


Comments

  • #2
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,856 ✭✭✭MicktheMan


    mountain wrote: »
    Had an extension put on our house last year, underfloor heating in that section,
    rads in rest of house. Plumber put in new oil condenser boiler to run both.
    Last week had a different plumber in house, and he said that the same temp water for rads is being used for the underfloor ie. 60 degree, warned me that is far too high, and also means a high usage of oil, (we have used €450 in the past 2 months), he reckons that the water for the underfloor should be 40 degree, and suggests putting a "valve" in to acheive this.

    Is he right?

    In a word, yes!


  • #3
    [Deleted User]
    Posts: 31,118 ✭✭✭✭ [Deleted User]


    I have my UFH set to about 34C, the thermostatic valve is at it's lowest setting! Works perfectly even during the cold spell!

    As for high oil usage, it could just be down to the exterme weather, but Oil boilers work better into a buffer tank feeding the UFH via the thermostatic valve.


  • #4
    aujopimur
    Registered Users, Registered Users 2 Posts: 3,953 ✭✭✭aujopimur


    Your U/F should have a mixing valve fitted.


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