Bradford White M-1-40S6BN Installation And Operating Instruction Manual page 18

Internet Version for Reference Only
Venting (Part II) continued-
VENT CONNECTOR LENGTHS FOR 3" (7.6 cm) DIAMETER VENT PIPE
Terminating
# of 90° Elbows
(excluding vent
terminal)
Through the Wall 1
Through the Wall 2
Through the Wall 3
Through the Wall 4
Through the Wall 5
Through the Roof 0
Through the Roof 1
Through the Roof 2
Through the Roof 3
Through the Roof 4
NOTE: When using 3" (7.6 cm) vent pipe, use a 3" (7.6 cm) to 2" (5.1 cm)
reducer and exit the building wall with 2" (5.1 cm) vent pipe using the 2"
(5.1 cm) 45° vent terminal supplied. Two 45° elbows are equivalent to one
90° elbow. Each 90° elbow is equivalent to 5 feet (1.5 m) of straight vent
pipe.
CONNECTION TO 2" (5.1 CM)
VENT PIPE
TABLE 6
Max straight Min straight
Length Length
ft (m) ft (m)
115 (35) 10 (3.1)
110 (33.5) 10 (3.1)
105 (32.0) 10 (3.1)
100 (30.5) 10 (3.1)
95 (29.0) 10 (3.1)
120 (36.6) 15 (4.6)
115 (35) 15 (4.6)
110 (33.5) 15 (4.6)
105 (32.0) 15 (4.6)
100 (30.5) 15 (4.6)
CONNECTION TO 3" (7.6 CM)
VENT PIPE
Figure 6
18