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Section 3. Installation
Table 6a.
– Maximum Number of Elbows per Vent Lengths
Maximum Number of Elbows per Vent Lengths
Maximum
Elbows
Allowed
[C]
Total Vent Length
(C=A+B)
[A]
Horizontal Maximum
Vent Length
[B]
Vertical Vent Length
3
2m (6.6 ft.)
0.67m (2.2 ft.)
1.33m (4.4 ft.)
3m (9.8 ft.)
1m (3.3 ft.)
2m (6.6 ft.)
4m (13.1 ft.)
1.33m (4.4 ft.)
2.67m (8.8 ft.)
5m (16.4 ft.)
1.67m (5.5 ft.)
3.33m (10.9 ft.)
6m (19.7 ft.)
2m (6.6 ft.)
4m (13.1 ft.)
2
7m (23 ft.)
2.33m (7.6 ft.)
4.67m (15.3 ft.)
8m (26.2 ft.)
2.67m (8.8 ft)
5.33m (17.5 ft.)
9m (29.5 ft.)
3m (9.8 ft.)
6m (19.7 ft.)
10m (32.8 ft.)
3.33m (10.9 ft.)
6.67m (21.9 ft.)
11m (36.1 ft.)
3.67m (12 ft.)
7.33m (24 ft.)
12m (39.4 ft.)
4m (13.1 ft.)
8m (26.2 ft.)
13m (42.6 ft.)
4.33m (14.2 ft.)
8.67m (28.4 ft.)
14m (45.9 ft.)
4.67m (15.3 ft ft.)
9.33m (30.6 ft.)
15m (49.2 ft.)
5m (16.4 ft.)
10m (32.8 ft.)
1
16m (52.5 ft.)
5.33m (17.5 ft.)
10.67m (35 ft.)
17m (55.8 ft.)
5.67m (18.6 ft.)
11.33m (37.2 ft.)
18m (59 ft.)
6m (19.7 ft)
12m (39.4 ft.)
19m (62.3 ft.)
6.33m (20.8 ft.)
12.67m (41.6 ft.)
20m (65.6 ft.)
6.67m (21.9 ft.)
13.33m (43.7 ft.)
21m (68.9 ft.)
7m (23 ft.)
14m (45.9 ft.)
22m (72.2 ft.)
7.33m (24 ft.)
14.67m (48.1 ft.)
Table 6.
– Permitted Minimum and Maximum Vent Heights By Size and Heater Model
Double-Wall Vent with Double-Wall Connector in Meters (Feet)
Vent Size
Model 200
Height min./max.
Model 300
Height min./max.
Model 400
Height min./max.
150 mm (6 in.)
1.8 m (6 ft.) / 22 m (72 ft.)
9 m (30 ft.) / 22 m (72 ft.)
Not Suitable
200 mm (8 in.)
1.8 m (6 ft.) / 22 m (72 ft.)
1.8 m (6 ft.) / 22 m (72 ft.)
2.4 m (8 ft.) / 22 m (72 ft.)
Double-Wall Vent with Single-Wall Connector in Meters (Feet)
Vent Size
Model 200
Height min./max.
Model 300
Height min./max.
Model 400
Height min./max.
150 mm (6 in.)
1.8 m (6 ft.) / 4.6 m (15 ft.)
Not Suitable
Not Suitable
200 mm (8 in.)
Not Suitable
1.8 m (6 ft.) / 6 m (20 ft.)
2.4 m (8 ft.) / 6 m (20 ft.)
