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7.2 Construction of concentric flue system CC
Assembly instructions are provided below:
Direct connection.
∗ The unit can be connected directly to an exterior wall using the exterior wall duct set, taking any hindrance
to the surrounding area into consideration, according to national, regional, local standards and regulations.
Ensure wind pressure on the flue terminal is not too extreme, such as a balcony, flat roof, corners and in
small alleys etc., as this may negatively influence the unit efficiency.
∗ Provide a recess in the exterior wall of around 155 mm (in a flammable wall ensure there is 50mm of extra
space around the outer pipe) and fix the wall duct with the wall plate to the inner side of the wall.
∗ The wall plate of the exterior wall duct must be sealed adequately against the wall on the outside, to avoid
potential moisture and/or flue gas leaks into the living space.
∗ The flue should be cased if necessary. Sufficient fireproof measures must also be taken when the flue is be-
ing mounted along flammable materials.
∗ Determine the position of the unit and the outlet and begin construction of the flue with the connection on
the unit, paying attention to the direction of installation. The inner flue must be installed for draining pur-
poses. Connect the elements by using clamping strips.
Indirect wall connection.
∗ The outlet may also be installed above the exhaust in the wall, taking any hindrance to the surrounding area
into consideration, according to national, regional, local standards and regulations. Ensure wind pressure on
the flue terminal is not too extreme, such as a balcony, flat roof, corners and in small alleys etc., as this may
negatively influence the unit efficiency.
∗ Provide a recess in the exterior wall of around 155 mm (in a flammable wall ensure there is 50mm of extra
space around the outer pipe) and fix the wall duct with the wall plate to the inner side of the wall. The wall
plate of the exterior wall duct must be sealed sufficiently against the wall on the outside, to avoid moisture
and/or flue gas leaks into the living space.
∗ The flue should be cased if necessary. Sufficient fireproof measures must also be taken when the flue is be-
ing mounted along flammable materials.
∗ Determine the position of the unit and outlet and begin construction of the flue with the connection on the
unit, paying attention to the direction of installation and connecting the elements by means of clamp strips.
∗ Mount a 90° bend directly on the wall pass-through and connect with the elements on the unit. Ensure that
all connections are gastight.
∗ The fitted pipe can be used between the bends or when connecting to the unit.
L= 50 - 250 mm. If necessary, use wall brackets to support the flue.
Comments:
The outlet vent may need to be mounted close to the wall in some situations. In this case, the 90° bend cannot be
easily placed. Note that at the location of the 90° bend where the bend has the smallest radius, an oval hole needs
to be created in the wall to ensure good passage.
