9
Support Components
The weight of a chimney system is considerable and requires independent support. Minimal weight should be borne
by the appliance. The weight of the chimney can be supported from floor level by using a base support plate, or floor
support; from the wall by using wall support top plates together with side plates or cantilever brackets; or from first
floor level by using a support plate and clamp fixed to the floor/ceiling joists.
Wall brackets are non load bearing and provide lateral support only. Refer to the load bearing tables on page 33 for
full details of maximum loadings.
Where the flue is freestanding above the roof and its height exceeds 1.5m above the last support or above the roof, a
height of up to 3m can be achieved unsupported using the extended locking bands at the joint immediately below the
last support and on each pipe joint above the last support.
Alternatively guy wire brackets can be used at the 1.5m level and every 1.5m thereafter in conjunction with guy wires,
or rigid stays (provided by others).
Chimney Termination
For full information regarding to chimney termination, please refer to Annex M of BS EN 15287-1. As a guide please
refer to page 31 of these installation instructions.
Terminals
All terminals must be secured with the use of a locking band. On solid fuel appliances, an open termination is normally
recommended. However in certain conditions, rain caps or anti-downdraught terminals may be used.
Rain caps and anti-downdraught terminals are available in three versions, with anti-bird mesh, with spark guard, or
without mesh. Where a terminal with mesh is used, there is a risk of soot build up, and therefore regular cleaning is
required to avoid blockage, particularly when using oil or solid fuel.
