Twin wall gas heating system designed for cost-effective venting of residential and small commercial atmospheric gas appliances with input up to 60kw. It is suitable for both internal and external use, either as a complete system or in combination with masonry, i.e. flue blocks or brick chimneys.
Note that BS 5440-1 requires the use of a stainless steel insulated flue on external runs exceeding 3 metres. K Vent fulfills this requirement and is fully interchangeable with the B Vent range.

■ Twist-lock bayonet jointing system.
■ No locking bands required.
■ Aluminium inner liner and aluzink outer case which can be painted if required.
■ 12.5 mm air gap between case and liner keep case temperature low.
■ 0-90° adjustable bend.
■ When joint is made, the liner covers the jointing collar, shielding it and permitting
easy drain-down of any moisture in the flue.

Debris Plate

Internal systems should be supported by using a support assembly fixed on top of the first floor/ceiling joist. A Firestop plate is also required fixed to the ceiling below. The clamp plate and firestop have tags fixed to ensure 50mm distance to combustibles. In a normal house, when passing through the second floor the only requirement is two firestop plates because the system is adequately supported at first floor level.