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32
Heatilator • HEIR36, HEIR42, HEIR50 • 2285-900 Rev. D • 8/12
Three Elbows
HEIR36 (NG/LP), HEIR42 (NG/LP), HEIR50 (NG/LP)
V
1
H
1
H
2
V
2
H
t
Max.
2 ft 610 mm * * ** 7 in 178 mm
3 ft 914 mm * * ** 2 ft 610 mm
4 ft 1.2 m * * ** 4 ft 1.2 m
5 ft 1.5 m * * ** 8 ft 2.4 m
6 ft 1.8 m * * ** 12 ft 3.7 m
7 ft 2.1 m * * ** 14 ft 4.3 m
10 ft 3.0 m * * ** 20 ft 6.1 m
*H
1
and H
2
has no specifi c restrictions EXCEPT,
after V
1
= 6 ft, then H
t
Max = 2 x V
1
**V
T +
H
T
= 60 ft Max.
Figure 7.9
Note: Flue restrictor is permit-
ted ONLY on 30 ft. minimum
vertical runs with no elbows.
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
V
2
2. Top Vent - Vertical Termination - (continued)
WARNING! Risk of Fire!
• HEIR36(NG/LP), HEIR42(NG/LP) and HEIR50(NG/LP)
models require a minimum of 24 inches of vertical venting
before attaching any elbow to the appliance.
DO NOT attach elbow directly to the appliance.