6.11 Cooking appliances6.11.1 Clearances around gas cooking appliancesClearances around gas cooking appliances shall be in accordance with the cooking appliance manufacturer’s specifications. In the event that clearances are not specified, clearances shall be as in Figure 6.11.1 and as follows:(a) Requirement 1 — Overhead clearances — (Measurement A)Range hoods and exhaust fans shall be installed in accordance with the range hood or exhaust fan and the gas appliance manufacturer’s instructions. Where a difference occurs, the greater clearance shall apply. In any event, or where no dimension is specified in the appliance.(i) The clearance between the supporting surface for the cooking vessels of the gascooking appliance and a range hood or exhaust fan (overhead clearance), shall be no less than 650 mm for a range hood, and no less than 750 mm for an exhaust fan.(ii) Any other downward facing combustible surface less than 650 mm above the supporting surface for the cooking vessels shall be protected for the full width and depth of the hob in accordance with Clause 6.11.2. This clearance to any surface shall not be less than 450 mm.(iii) For existing installations, from the date of adoption of this standard, where the appliance is being replaced, the overhead clearance from the highest part of the highest burner of the gas appliance to the range hood shall be not less than 600 mm unless the appliance manufacturer’s instructions specifies a greater clearance. Where no dimension is specified in the appliance instructions, the overhead clearance from the highest part of the highest burner of the gas appliance to the range hood shall be no less than 600 mm and no less than 750 mm for an exhaust fan.Removable accessories such as a wok trivet that sits upon a hob trivet shall not be taken into account in determination of the supporting surface for the cooking vessels.Minor elevations in trivets such as a wok trivet formed into a trivet shall not be taken into account in determination of the supporting surface for the cooking vessels.Where the required clearance to a range hood cannot be met, a range hood constructed of non-combustible materials may be installed at not less than 450 mm, provided that —(A) the range hood operates at the installed clearance; and(B) the gas appliance is certified as a caravan/marine cooker at the installed clearance.NOTE 1 This requirement does not apply to the installation of commercial catering equipment.(b) Requirement 2 — Measurements B (side clearances) and C (height)Where B, measured from the periphery of the nearest burner to any vertical combustible surface is less than 200 mm, that surface shall be protected in accordance with Clause 6.11.2to a height (C) of not less than 150 mm above the periphery of the nearest burner for the full dimension (width or depth) of the cooking surface area. Where the gas cooking appliance is fitted with a “splashback”, protection of the rear wall is not required provided the splashback achieves protection of any combustible surface less than 200 mm from the periphery of the nearest burner to a height not less than 150 mm above the periphery of the nearest burner.NOTE 2 Consider window treatments and painted surfaces on glass splashbacks when located near cooking appliances.