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Radiators for A2W system

  • 07-02-2021 5:19pm
    #1
    Registered Users Posts: 11,827 ✭✭✭✭ Gael23


    Looking for recommendations on Radiators for an Air to Water heat Pump system, not realistic to redo the whole house to install underfloor heating


Comments

  • Registered Users Posts: 252 ✭✭ Biker1


    Gael23 wrote: »
    Looking for recommendations on Radiators for an Air to Water heat Pump system, not realistic to redo the whole house to install underfloor heating

    You need to get room by room heat loss calculation done. Only then will you know what output the radiators must achieve. Don't be fooled by sales talk saying you must install aluminium rads. 500w output from a steel rad is the same as 500w output from an aluminium rad at a given delta T. The only difference will be in the size of the two and is not as much as people think.


  • Registered Users Posts: 11,827 ✭✭✭✭ Gael23


    Biker1 wrote: »
    You need to get room by room heat loss calculation done. Only then will you know what output the radiators must achieve. Don't be fooled by sales talk saying you must installv aluminium rads. 500w output from a steel rad is the same as 500w output from an aluminium rad at a given delta T. The only difference will be in the size of the two and is not as much as people think.

    So could existing radiators be kept?


  • Registered Users Posts: 1,627 ✭✭✭ quentingargan


    Gael23 wrote: »
    So could existing radiators be kept?

    Again, you would need a room by room assessment, but you may find larger double radiators can be moved to replace smaller singles, leaving you to replace a smaller number


  • Registered Users Posts: 11,827 ✭✭✭✭ Gael23


    Who would do this heat loss assessment?


  • Registered Users Posts: 252 ✭✭ Biker1


    Gael23 wrote: »
    Who would do this heat loss assessment?

    Some heating suppliers can do it but only if they have the correct information in terms of u-values, room areas and volumes.
    "Rubbish in-rubbish out"


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