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code 6118250 iss. 10-2018
In particular, as to flues/smoke ducts, we wish to remind you of the following:
MATERIALS:
- They must withstand mechanical stress;
- They must withstand any acid condensation that may form from the combustion products
(the use of STAINLESS STEEL 316 is recommended);
- They must be waterproof;
- They must obviously withstand the heat.
-
The pipes that can be used are rigid in painted steel (minimum thickness 1.5mm) or stainless steel (minimum
thickness 0.5mm). The male/female coupling collars must overlap by at least 40mm.
- The tube diameter depends on the type of system. The stove has been designed for pipes with an 80mm
diameter maximum, as shown in the table; in some cases a 100mm diameter is recommended. If pipes with a
100mm diameter must be used, connect them to the stove with a "T" coupling with an 80mm diameter and a
fitting ø 80 - ø 100.
FLUE PIPE
DIAMETER
ASSESSMENT
Pipe shorter than 5m
80 mm
Correct
Pipe longer than 5m
100mm (minimum)
Mandatory
Installations located
over 1200 m above sea level
100mm (minimum)
Recommended
PATTERN AND SECTIONS:
- They must be as vertical as possible, with a constant section and a smooth internal surface to prevent the
accumulation of head losses that would affect the draft required to discharge the smoke.
- The lower part of the flue must be provided with a collection "T" with lid (steel flue) or with an inspection door
(masonry flue), so that any condensation or soot can be collected.
- Smoke ducts connecting the unit to the flue must be as short as possible (2 - 3 metres maximum) and with two 90°
turns maximum. It is important for them to have a 3-5° positive slope towards the flue to ensure the smoke goes
out.
- Calculate a loss of head of 1 metre for each 90° turn.
- Calculate a loss of head of 0.5 metre for each 45° turn.
- To connect the flue and smoke duct, "T" junctions with inspection plugs must be used, to make cleaning easier.
-
It is forbidden to install gates or valves that can prevent the fumes from going out.
CHIMNEY:
- In order to prevent any stove malfunction, the chimney must comply with these installation rules:
- It must be the same section and internal shape as the flue and an outlet section no less than twice the section of
the flue.
- It must be a windproof chimney, to guarantee the expulsion of the smoke with winds coming from any direction
and angle.