Smoke flue
Ensure the flue’s dimensions meet
local regulations and the applicable
installation standards in line with good
practice.
Basic information
For good draught, the stove must be
suited to the flue (or vice versa).
An oversized flue is as detrimental
to the smooth operation of the
stove as an undersized flue. At
www.stuv.com > Info & Services
> Practical questions > Which
fireplace fits your Stûv? you will find
a simplified method to determine the
specifications of the flue depending
on the type of stove.
The flue should be as straight
as possible and insulated to
encourage the draught and prevent
condensation.
The ideal solution is a flue built inside
the building and thermally insulated.
An outside flue without any insulation
must be avoided.
The stove must never be connected to
a smoke flue serving several systems.
Take care to avoid heat loss !
If several flues are available : only use
one of them. Block up the unused
flues at the top and bottom and,
generally speaking, ensure that the
top of the recess where the stove is
fitted is air-tight [diagram 1].
Standard outlet diameter
Stûv 21/65C Ø180
Stûv 21/65H Ø200
Stûv 21/75 Ø180
Stûv 21/85 Ø200
Stûv 21/95 Ø250
Stûv 21/105 Ø200
Stûv 21/75 DF Ø250
Stûv 21/85 DF Ø250
Stûv 21/95 DF Ø250
Some flue configurations may
require a different diameter than that
provided as standard. Should this be
the case, please consult your retailer.
Unused flues or ventilated spaces
between walls can generate
undesirable counter-draughts (the
hot air escapes) [diagram 2], or cause
the entry of cold air from outside
[diagram 3].
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