Please feel free to use our free BTU calculator & radiator sizer. Enter your room information in the boxes below and press "Calculate" to find the recommended minimum size of radiator for your room. As with all heat loss btu calculators, assumptions are made about your room, as such this utility should only be used as a guide. All dimensions should be entered in metres.
Select Glazing Single Glazed Double Glazed Double Glazed (Post 2002) or
Select Wall Type Solid Wall Cavity (Uninsulated) Cavity (Insulated) or
Select Floor Type Heated Room Below Wood Concrete (Uninsulated) Concrete (Insulated) or
Select Above Ceiling Internal Room Uninsulated 100mm Insulation 200mm Insulation or