Fixed straight lengths have an installed effective length 38 mm less than stated actual length.
IL twin wall, air gap insulated gas vent system for gas appliances in residential or small commercial installations with inputs up to 70 kW., having a draught-hood or with a 250°C max. flue gas temperature and zero or negative pressure in the flue. Aluminium liner with Zalutite outer casing, suitable for internal and external use, either as a complete system or in combination with flue blocks or a brick chimney. Maximum external or ventilated roof area use up to 3 m.
Certified to BS EN 1856-1 and tested to BS EN 1859 to the performance designations as defined in Table A. Manufactured by a BS EN 9001 registered company.
Must not be used for condensing, oil-fired or solid fuel systems.
If used externally galvanised components will require suitable weather protection.