flue lengths	adaptor	rain cap
	wall band	roof support
storm collar	locking band	anchor plate

A prefabricated factory-made twin-wall chimney
system incorporating a high-quality insulation. It is suitable
for appliances burning all types of fuel.
The standard specification product is constructed entirely from
stainless steel, but the system is available with a variety of
material options depending upon application. In all cases, the
external casing is weather-proof and carries the structural
load. The inner lining is resistant to the often corrosive
products of combustion and is free to expand or contract as
flue gas temperatures change. The annulus between the inner
liner and outer skin is filled with a high temperature resistant
insulation, and the product is designed to provide high
thermal resistance, rapid stabilisation of the flue temperature,
and a low temperature on the external surface of the pipes
and fittings.

This system is designed primarily for gravity flow
application and for appliances with flue-gas temperatures up
to 540°C under continuous firing, and 760°C under short
firing. The range of available diameters provides for
appliances rated up to 4MW. The system is not designed for
use with condensing or pressure applications.
SM W is designed to be used internally and externally. The
smooth stainless steel inner lining heats rapidly to produce a
strong draught which ensures that waste gases are exhausted
and condensation of the harmful products of combustion is
minimised.

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