21
Heatilator • HEIR36, HEIR42, HEIR50 Installation Manual • 2285-980 Rev. G • 12/14
Figure 4.8
1. Top Vent - Horizontal Termination
- (continued)
Three Elbows
Note:
Flue restrictor is permit-
ted ONLY on 30 ft. minimum
vertical runs with no elbows.
H
2
H
1
V
2
V
1
HEIR36 (NG/LP), HEIR42 (NG/LP), HEIR50 (NG/LP)
V
1
H
1
V
2
H
2
2 ft
610 mm
7 in
178 mm
*
H
2
Max = 2 X V
2
3 ft
914 mm
2 ft
610 mm
*
H
2
Max = 2 X V
2
4 ft
1.2 m
4 ft
1.2 m
*
H
2
Max = 2 X V
2
5 ft
1.5 m
9 ft
2.7 m
*
H
2
Max = 2 X V
2
6 ft
1.8 m
12 ft
3.7 m
*
H
2
Max = 2 X V
2
7 ft
2.1 m
14 ft
4.3 m
*
H
2
Max = 2 X V
2
10 ft
3.0 m
20 ft
6.1 m
*
H
2
Max = 2 X V
2
V
1
+ H
1
must be adhered to.
* V
2
has no speci
fi
c restrictions EXCEPT,
H
t max
= 2 x V
t
and V
total
+ H
total
cannot exceed 60 ft Maximum
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.
