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