Diagram 3.10: Typical hearth installations

Diagram 3.10 Typical hearth installations (a) Appliance that cannot cause hearth temperature to exceed 100°C appliance clearances from Diagram 3.9, non-combustible board or tile 12 mm, constructional hearth, appliance dimensions from Diagram 3.7, e.g. flooring, combustible material, change in level to mark safe perimeter (b) Appliance standing directly on a constructional hearth appliance clearances from Diagram 3.9, constructional hearth, appliance dimensions from Diagram 3.7, e.g. flooring, combustible material, change in level to mark safe perimeter (c) Appliance in a fireplace recess with a superimposed hearth clearances from Diagram 3.9, superimposed hearth 150 mm, constructional hearth, appliance 25 mm, dimensions from Diagram 3.7, e.g. flooring, combustible material, change in level to mark safe perimeter References: see paras 3.23 and 3.29, see Diagrams 3.7 & 3.9