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Boiler help

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  • neilmcl
    neilmcl Posts: 19,460 Forumite
    Part of the Furniture 10,000 Posts Name Dropper
    edited 29 July 2020 at 2:22PM
    The Potterton Promax Ultra is a condensing boiler so at the temperature it is set it will never drop into condensing mode so will never run at it's most efficient. The return flow need to be at around 55 degrees to get the boiler into condensing mode which means that your boiler temperature needs to be somewhere around 60 degrees depending on how large you system is and how it is set up. You will need to have a play with it when you next put the heating on.
    The recommended CH temperature for most combi boiler manufacturers is 75℃ (60℃ for hot water).
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