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Heatilator • HEIR36, HEIR42, HEIR50 • 2285-900 Rev. D • 8/12
H
2
H
1
INSTALLED
HORIZONTALLY
V
1
Figure 7.4
Two Elbows
Note: Flue restrictor is permit-
ted ONLY on 30 ft. minimum
vertical runs with no elbows.
WARNING! Risk of Fire!
• HEIR36(NG/LP), HEIR42(NG/LP) and HEIR50(NG/LP) models
require a minimum of 36 inches of vertical venting before attaching
any elbow to the appliance for the venting confi guration in Figure 7.4.
DO NOT attach elbow directly to the appliance.
HEIR36 (NG/LP), HEIR42 (NG/LP),
HEIR50 (NG/LP)
V
1
Minimum
H
1
+ H
2
3 ft 914 mm 18 in 457 mm
4 ft 1.2 m 3 ft 914 mm
5 ft 1.5 m 7 ft 2.1 m
6 ft 1.8 m 10 ft 3.0 m
7 ft 2.1 m 14 ft 4.3 m
8 ft 2.4 m 16 ft 4.9 m
9 ft 2.7 m 18 ft 5.5 m
10 ft 3.0 m 20 ft 6.1 m
V
1
+ H
1
+ H
2
= 60 ft Maximum
H
1
+ H
2
= 20 ft Maximum