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Radiator Size - Should I go larger then calculators suggest?

Discussion in 'Plumbing and Central Heating' started by ToastyToes, 12 Jan 2020.

  1. ToastyToes

    ToastyToes

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  3. johnny2007

    johnny2007

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    I have the same radiators and if i hadn't gone over spec i would've been cold.
    They don't work as well as standard panel radiators, so go with the highest btu you can.
     
  4. Jackrae

    Jackrae

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    Classic case of 'form over function'
    Ever wondered why large ("ugly") cast iron radiators seemed to work yet modern ("stylish') compact units seem to struggle
     
  5. ToastyToes

    ToastyToes

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    Thanks for your input. Do you have the same size?
     
  6. muggles

    muggles

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    I normally go 50% bigger - most radiator calculators (especially ones that use old fashioned BTU rather than modern kW) tend to use flow and return temperatures that are too high for modern systems. Calculate based on 70°C flow / 50°C return for best efficiency
     
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  7. johnny2007

    johnny2007

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    No, i have a 1400mm.
    Accordingly to btu i needed a 1000mm but it wouldn't have been enough.
    Those radiators get very hot, but the heat output is nowhere near the standard steel panel radiators.
     
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