Heatilator • HEIR36-IFT, HEIR42-IFT, HEIR50-IFT Installation Manual • 2458-980 Rev. B • 8/17
28
Three Elbows
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
V
2
2. Top Vent - Vertical Termination
- (continued)
Figure 4.15
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 specific restrictions EXCEPT,
after V
1
= 6 ft, then H
Total
Max = 2 x V
1
**V
Total +
H
Total
= 50 ft (15.2 m) Max.
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.
