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    Room Sizing Worksheet
    29 September 2025
    Sizing Guide

    Room Sizing Worksheet

    Room Sizing Worksheet

    Collect these details, then enter them into the Heating Calculator (ΔT50 default).

    Room
    Dimensions (metres)
    Windows
    Exposure
    Outside walls
    Notes (optional)
    Draughts, large openings, always-open doors, unusual heat sources…
    Enter these details into the Heating Calculator to see your total room heat requirement and suggested radiators.
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