Flue Sizing

Each firechest has been tested to establish the optimum flue size required to give best possible performance. The recommended flue sizes are shown in the range table. The minimum flue height required is 4.5m above the fireplace opening.

Regulations and Requirements

Current building regulations require 100mm of solid non-combustible masonry to be built around the sides and back of the firechest. An adequate combustion air supply must be provided in accordance with our instructions or document J of the building regulations. The inside of the firechest should be lined with firebrick slips. Schiedel Isokern supply buff coloured firebricks. The finished fireplace opening size will be reduced when the bricks are installed.