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FLUE TYPES
Before ventilation can be sized we need to identify the type of flue system.
Type B
– Open flue: takes air from the plant room (adequate ventilation must be available).
Type C
– Room sealed: takes air from outside
We also need to know the classification of the room type.
• Boiler house – a dedicated building for the installation of boilers and ancillary plant.
• Boiler room – a dedicated room within a building for the installation of boilers and ancillary plant.
• Enclosure – space in which a boiler(s) is installed, which is not large enough to permit access for work other than
maintenance via external access.
• Plant room – a room in a building that houses plant and machinery.
• Open space – e.g. in a warehouse.
CLASSIFICATION OF TYPE B FLUES
*Appliance fan also downstream of draught diverter
Appliance type
Primary definition
Natural draught
Fan down stream of
heat exchanger
Fan upstream of
heat exchanger
B open flue
B1- appliance with a
draught diverter
B11
B12
B14*
B13
B2 – appliance
without draught diverter
B21
B22
B23
TYPE B22
TYPE B23
TYPE B11
TYPE B12
TYPE B13
TYPE B14
EVOMAX PLUME KIT - 80/125
EVOMAX PLUME KIT - 100/150
UIN
DESCRIPTION
220922
Plume kit 80/125
213274
Plume kit 1m extension 80/125
213272
Plume kit 90 deg elbow 80/125
213273
Plume Kit 45 deg elbow 80/125 (Pair)
UIN
DESCRIPTION
220923
Plume kit 100/150
213277
Plume kit 1m extension 100/150
213275
Plume kit 90 deg elbow 100/150
213276
Plume kit 45 deg elbow 100/150 (Pair)
80 / 125 DIA FLUE ~ MAXIMUM PERMISSIBLE FLUE
LENGTHS (M)
Evomax
Model
30/30P
40/40P
60/60P
80/80P
Y
X
0.5
39.2
39.2
4.7
9.2
2.0
38.5
38.5
4.0
8.5
4.0
37.6
37.6
3.1
7.6
6.0
36.7
36.7
2.2
6.7
8.0
35.8
35.8
1.3
5.8
10.0
34.9
34.9
0.4
4.9
100 / 150 DIA FLUE ~ MAXIMUM PERMISSIBLE FLUE
LENGTHS (M)
Evomax
Model
60/60P
80/80P
100
120
Y
X
0.5
27.0
32.0
8.0
14.6
2.0
26.6
31.6
7.6
14.2
4.0
26.0
31.0
7.0
13.6
6.0
25.5
30.5
6.5
13.1
8.0
24.9
29.9
5.9
12.5
10.0
24.4
29.4
5.4
12.0
X
Internal concentric lengths
Y
