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Gas home radiators - cruising or revving up?

  • 01-01-2016 5:55pm
    #1
    Benedict
    Registered Users, Registered Users 2 Posts: 684 ✭✭✭


    I have a gas condenser boiler. Does anyone know - does it use more gas when it's powering up than when it's just ticking over? Somebody told me that it's cheaper to leave it on than to turn it off for an hour or two and then turn it on again because when the radiators are already hot, not much gas is being used. A bit like cruising in the car as opposed to accelerating up to the speed you want? Anyone know if this is true?


Comments

  • #2
    Dtp1979
    Registered Users, Registered Users 2 Posts: 12,870 ✭✭✭✭Dtp1979


    Benedict wrote: »
    I have a gas condenser boiler. Does anyone know - does it use more gas when it's powering up than when it's just ticking over? Somebody told me that it's cheaper to leave it on than to turn it off for an hour or two and then turn it on again because when the radiators are already hot, not much gas is being used. A bit like cruising in the car as opposed to accelerating up to the speed you want? Anyone know if this is true?

    Yes modern gas boilers modulate down alright. The key is fitting the right sized boiler to match the needs of the house. Most new boilers fitted to your standard estate house 8-10 rads is having a 24kw boiler thrown in. I'd say 12 kW max is all they'd need. So on initial start up, those boilers overfire quite a bit, but they will eventually turn themselves down when the rads are hot.

    There's no need to have the boiler on all day. Proper heating controls installed and that'd make everything more efficient


  • #3
    Benedict
    Registered Users, Registered Users 2 Posts: 684 ✭✭✭Benedict


    Thanks for that info.

    My boiler is actually outside the house and I don't have any thermostats inside. My worry was that if I left the heating on it wouldn't matter if the house was already warm. I thought maybe the boiler was either on or off. But from what you say, the boiler eases off on the throttle once things have got going so it's better to leave it on rather than turning it on and off the whole time. I had a feeling that was the case but I wasn't sure.


  • #4
    Dtp1979
    Registered Users, Registered Users 2 Posts: 12,870 ✭✭✭✭Dtp1979


    Benedict wrote: »
    Thanks for that info.

    My boiler is actually outside the house and I don't have any thermostats inside. My worry was that if I left the heating on it wouldn't matter if the house was already warm. I thought maybe the boiler was either on or off. But from what you say, the boiler eases off on the throttle once things have got going so it's better to leave it on rather than turning it on and off the whole time. I had a feeling that was the case but I wasn't sure.

    No I'm not telling you to leave it on all the time. That's an inefficient way of using your boiler.


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