If the mantlepiece protrudes further than 100mm from the fireplace, then it will be
necessary to have further clearance to the top of the stove. The distance the mantle
protrudes past the 100mm should be added to the clearance.
For example, if the mantle protrudes 200mm, the clearance to the mantle should be
650mm. (See Fig6).
If there is a studded wall surrounding the fireplace as in Fig.6, ensure the clearances
in this Fig are adhered to.