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Flue outlet terminal for small diameter natural draught open-flued appliances
4.18NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue serving a natural draught open-flued appliance, with a diameter not greater than 170 mm, should be fitted with an outlet terminal that complies with BS EN 1856: 1, and conforms to BS EN 13502.
combustion-appliancesflue-outletsnatural-draughtProtective cage for large diameter natural draught open-flued appliances
4.19NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue serving a natural draught open-flued appliance, with a diameter greater than 170 mm, should be fitted with a protective cage designed for solid fuel use, having a mesh size not less than 6 mm a
combustion-appliancesflue-outletssolid-fuelnatural-draught