Flue outlet positions for solid fuel appliances

Table 3.3 Flue outlet positions for solid fuel appliances Item 1 - At or within 600 mm of the ridge: Not less than 600 mm above the ridge. Item 2 - Elsewhere on a roof, whether pitched or flat: Not less than 2300 mm horizontally from the nearest point on the weather surface; and (a) not less than 1000 mm above the highest point of intersection of the flue/chimney and the weather surface; or (b) not less than as high as the ridge. Item 3 - Below (on a pitched roof) or within 2300 mm horizontally to an openable rooflight, dormer window or other opening: Not less than 1000 mm above the top of the opening. Item 4 - Within 2300 mm of an adjoining building, whether or not beyond the boundary: Not less than 600 mm above the adjacent building. Notes: (1) The weather surface is the building external surface, such as its roof, tiles or external walls. (2) A flat roof has a pitch less than 10°. (3) The clearances given for items 1 and 2, as appropriate, should also apply.