SEE FIG. 1
The following notes are intended to give general
guidance. The cross sectional area of the flue serving the
cooker must not be less than the area of the flue outlet of
the cooker. If flue pipe is to be used it must not be less
than 100mm internal diameter.
A straight vertical section of cast iron flue pipe of a
length not less than 600mm MUST be utilised
immediately above the flue spigot before any bends
are used.
In any event the minimum flue length MUST not be
less than 3m.
Flue pipes and fitting should be constructed from one of
the following materials:-
(a) Cement
(b) Aluminium or stainless steel
(c) Cast iron or mild steel acid resistant vitreous enamel
lined.
If a chimney is to be used, it preferably should be one that
is composed of or lined with a non-porous acid resistant
material.
A flue pipe constructed in cast iron, should form the initial
connection to lined chimneys.
Where a chimney is to be used which is not composed of
or lined with a non-porous acid resistant material it should
be lined with a stainless steel flexible flue liner in
accordance with the relevant standards.
Before connecting the appliance to or inserting a liner into
a flue that has been previously used, the flue MUST be
thoroughly swept clean of any soot and loose materials. If
a baffle plate, etc. is fitted in the flue it must be removed
before connecting the appliance to, or inserting a liner into
the flue.
The flue should terminate in accordance with the
regulations in force.
The appliance can only be installed in a room which
meets the ventilation regulations in force. But, in any
event the room must have a permanent vent of minimum
free air area of 37cm
2
.
Effect of an Extractor Fan
If there is any type of extract fan fitted in the same room
as an appliance, there is a possibility that if adequate air
inlet from outside is not provided, spillage of the products
from the appliance flue could occur when the extract fan
is in operation.
Where such installations occur, a spillage test must be
carried out.
6
FLUE SYSTEM
AIR REQUIREMENTS
FIG. 1
