
Heat & Glo • RED60 • 2159-900 Rev. B • 12/09
48
NOTE
: Maximum total vent run= Total vertical vent run + Total horizontal vent run
V1
H2
H1
V2
MAXIMUM
VERTICAL
DROP
DIRECT VENT WITH 2 FT. MINIMUM VERTICAL (V
1
) OFF TOP OF APPLIANCE
MAX. ELBOWS
(45° & 90°)
MAX. TOTAL VENT RUN (FT.)
Total V + Total H
MAX. VERT. DROP (FT.)
V
2
3
24 ft.
7 ft.
4
17 ft.
7 ft.
DIRECT VENT WITH 3 FT. MINIMUM VERTICAL (V
1
)OFF TOP OF APPLIANCE
MAX. ELBOWS
(45° & 90°)
MAX. TOTAL VENT RUN (FT.)
Total V + Total H
MAX. VERT. DROP (FT.)
V
2
3
29 ft.
7 ft.
4
22 ft.
7 ft.
DIRECT VENT WITH 4 FT. MINIMUM VERTICAL (V
1
) OFF TOP OF APPLIANCE
MAX. ELBOWS
(45° & 90°)
MAX. TOTAL VENT RUN (FT.)
Total V + Total H
MAX. VERT. DROP (FT.)
V
2
3
34 ft.
7 ft.
4
26 ft.
7 ft.
Figure 7.50
Note
: 1 ft. of vertical drop decreases
horizontal length by 2 ft.