Heatilator GDST5244I Owner's Manual page 16

Top Vent--Horizontal Termina6tion--Two or three Elbows
You may use a maximum of three 90° elbows (or six 45° elbows) in any vent confi guration, Some may be installed
horizontally.
Figure 5.6 Two or Three Elbows, some Horizontal
16
Note: Subtract 3 ft (914 mm) from the total horizontal
measurement for each 90° elbow installed horizontally.
Subtract 1-1/2 ft (457 mm) from the total horizontal
measurement for each 45° elbow installed horizontally.
V min. V max.
1 1
18 in./457 mm x
24 in./610 mm x
x 25 ft/7.62 m
H
3
Installed
Horizontally
H
H
2
2
Heatilator • GDST5244I • 4045-127 Rev Q • 02/07
Table 5.3
H +H max. H +H
1 2 1
18 ft/5.49 m 18 ft/5.49 m
25 ft/7.62 m 25 ft/7.62 m
25 ft/7.62 m 25 ft/7.62 m
+H max.
2 3
Installed
Vertically
V
H
1
1