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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.
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General: DIN rail timers

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    • CommentAuthorowlman
    • CommentTimeNov 15th 2023
     
    I need a 16A ( resistive load ) DIN rail timer for an area of electric UFH cable.
    Prices vary massively £12- £150. My CUs are Hager and no prizes for guessing who's timers cost £150. Does anyone have any experience, good or bad, of cheaper modules.
    • CommentAuthorMike1
    • CommentTimeNov 15th 2023 edited
     
    For UFCH control, I've bought - but not yet installed - a Shelly Pro 4PM timer (£100) + separate 25A Legrand contactors. Although Shellys are rated nominally at 16A per channel, they can only take 1.5mm² cable, hence the need for a separate contactor. That wouldn't be much of a saving by the time you've added an MCB for the contactor, but would give more control options.

    https://shellystore.co.uk/product/shelly-pro-4pm/

    To control a single device you could instead use a Shelly Pro 1 and save £50, but that has no control buttons so can 'only' be controlled via LAN / WiFi / Bluetooth.
    • CommentAuthorowlman
    • CommentTimeNov 15th 2023
     
    Thanks Mike; They look pretty sophisticated with more features than I envisaged.
    I managed to find a simple Hager analog model for £45 online, although UK sellers generally want over £100 for the same model, with one so called trade outlet with the gall to ask £190.

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