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Benefits of oversizing your radiators - is it recommended?

Discussion in 'Plumbing and Central Heating' started by mobilejake, 16 May 2014.

  1. mobilejake

    mobilejake

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    Hi,

    I am putting in new heating and am tempted to oversize my radiators on the assumption that it will heat the house quicker...

    Apart from cost of radiators, can anyone see any downsides? Is it recommended or problematic in any way?

    Cheers,
    J
     
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  3. St0rmer66

    St0rmer66

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    Definitely if you're redoing it all anyway. The relative small extra cost of the bigger radiators will pay for itself eventually by the fact you can run your boiler at a cooler flow temperature and keep it condensing for longer (e.g. 60 flow instead of 70). Obviously there are diminishing returns if you go too far though!
     
  4. mobilejake

    mobilejake

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    Cheers stormer - that's great! Any idea how much i should oversize? 30%?
     
  5. Richardthe3rd

    Richardthe3rd

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    I'd oversize as much as you can, without it costing you a fortune & the radiators looking huge. This will future proof your home, when Natural Gas runs out or is just a silly price, we'll be forced to use other heat generating plant. At the moment heat pumps are becoming more & more popular. Their optimum operating temperature is vastly lower than a gas boiler.
     
  6. newbuildinstaller

    newbuildinstaller

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    I can get you a cracking deal on some 3000x800 tripples!!!
     
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  8. Steelmasons

    Steelmasons

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    Really??? , are you not forgetting an important factor?????
     
  9. ALEC1

    ALEC1

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    Radiators are over sized every time it is warmer than design temperature which is usually -3c...

    Save your money and spend it on compensation controls that vary the flow temp and insulation...
     
  10. St0rmer66

    St0rmer66

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    The way I read it is that he's replacing the radiators regardless. If the current radiators are heating the house amply then I wouldn't normally suggest to rip them out for no reason. But if all are being replaced there are only advantages to oversizing assuming good controls to stop the house from being heated any more than it needs to be (be that WC or just plain old TRV's).
     
  11. mobilejake

    mobilejake

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    Thanks guys and yes, i am replacing regardless! I think I will oversize by about 15%. I can do that without going double on any rads!
     
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