LAARS POWER VENTED GAS WATER HEATER - Installation Manual User Manual
Page 18
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Venting (Part II) continued-
TABLE 6
VENT CONNECTOR LENGTHS FOR 3” (7.6 cm) DIAMETER VENT PIPE
Terminating
# of 90
° Elbows
(excluding vent
terminal)
Max straight
Length
ft (m)
Min straight
Length
ft (m)
Through the Wall
1
115 (35) 10
(3.1)
Through the Wall
2
110 (33.5) 10
(3.1)
Through the Wall
3
105 (32.0) 10
(3.1)
Through the Wall
4
100 (30.5) 10
(3.1)
Through the Wall
5
95 (29.0) 10
(3.1)
Through the Roof
0
120 (36.6) 15
(4.6)
Through the Roof
1
115 (35) 15
(4.6)
Through the Roof
2
110 (33.5) 15
(4.6)
Through the Roof
3
105 (32.0) 15
(4.6)
Through the Roof
4
100 (30.5) 15
(4.6)
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
CONNECTION TO 3” (7.6 CM)
VENT PIPE
Figure 6