Existing Smoke Flue; Minimum Flue Section; General Recommendations; Type And Characteristics Of The Pipe Connecting The Appliance To The Smoke Flue - deville C07836 Notice D'installation Et D'emploi

. Fireclay flue blocks compliant with French Standard NF P 51-311
. Concrete flue blocks compliant with NF P 51-321
. Composite metal pipes compliant with NF D 35-304 and NF D 35-303
. Fireclay bricks compliant with NF P 51-301
. Refractory bricks compliant with NF 51-302
- The use of certified insulating materials means that on-the-spot insulating work can be avoided,
particularly where the chimney stack is concerned.

5.2.1.2 Existing Smoke Flue

The installer is responsible for existing parts. He should check the condition of the flue and carry out any
work required in order to ensure that it is in proper working order and compliant with the regulations in
force.
He should sweep the flue and then check the following points very thoroughly :
. Compatibility of the flue with the intended use
. Stability
. The flue must be empty and smoke-tight (DTU 24-1, Appendix II)
If the flue is not compatible, make a casing using an approved method (*) or install a new flue.
(*) French assessment and certification system

5.2.2 Minimum Flue Section

Square or oblong flue blocks
Circular flues

5.2.3 General recommendations

A good flue will be built of materials with low heat conducting properties so that it stays hot.
-
lt should be completely smoke-tight, stable and have no rough spots.
-
- There should be no sudden changes in section (slope in relation to the vertical less than 45° ).
It should extend at least 0.4 m above the ridge of the roof and of adjacent roofs.
-
Two appliances should not be connected to the same flue.
-
It should come out into the room containing the appliance at a height of at least 50 mm, unless special case
-
indicated by the flue's manufacturer.
The interior face should be at least 16 cm away from any wood or combustible materials.
-
Flue blocks should be placed with the male part towards the bottom so as to avoid any leaks to the outside.
-
- The flue should include no more than two changes of direction, i.e. no more than one non-vertical section.
The bend angle should not exceed 45° over a total f lue height limited to 5 m. For any greater height, this
angle should not exceed 20° .
- Smoke-tightness, insulation, openings in walls or floors and sale fire distances should all strictly comply with
the provisions of DTU 24-2-2.

5.3 TYPE AND CHARACTERISTICS OF THE PIPE CONNECTING THE APPLIANCE TO THE SMOKE FLUE

- A connecting pipe must be installed between the appliance and the smoke flue outlet.
Possible working with doors
open
Minimum section 4 dm
Minimum diameter 200 mm
19
Working with doors closed
2
Minimum section 2,5 dm
Minimum diameter 153 mm
2