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Outlets from flues - General requirements
4.17NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
The outlet from a flue should be so situated externally as to allow the safe dispersal of the products of combustion and, if a balanced flue, the intake of air. The flue outlet should be located as sh
combustion-appliancesflue-outletsFlue 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-draughtFlue outlet guard protection
4.20NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
A flue outlet should be protected with a guard if – (a) a person could easily come into contact with it; and (b) it could be damaged.
combustion-appliancesflue-outletsprotectionProtection of vulnerable flue outlets
4.21NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
If a flue outlet is in a vulnerable position, such as where it discharges at a point within reach of the ground, a balcony, a veranda or window, it should be designed to prevent the entry of any matte
combustion-appliancesflue-outletsprotection