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    • CommentAuthoralec
    • CommentTimeMar 5th 2017
    I am a gas safe registered installer based in central london. 2 years ago I removed a 10 yr old 55kw condensing boiler on on off controls. I replaced it with a 35kw condensing boiler but with compensation controls.

    The annual kwh usage went down from 62000 to 49000. Degree data from the London city weather station indicates the 2nd year was actually colder.

    The client comments that the house was warmer than ever before.

    Compensation controls are something we have to get used to, it seems!
    • CommentAuthortony
    • CommentTimeMar 5th 2017
    I agree but it not so simple as more than one thing changed
    • CommentAuthorgravelld
    • CommentTimeMar 5th 2017
    It's a useful optimisation, but 35kW is still a lot of power at a domestic scale. The answer is in truly reducing the demand.
    • CommentTimeMar 5th 2017
    It is about 20% better now, could that just be the boiler being better at condensing because it is better sized for the thermal load?
    • CommentAuthoralec
    • CommentTimeMar 11th 2017
    Not at all..it's the way the software manages the heating load...Rads never much hotter than 50c...
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