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RDVN Series Direct Vent Gas Fireplace
20007628
CFM141
2/2/01 sta
Maximum
20 ft. (6.1m)
7.5'
(2.3m)
7TDVRT90
Elbow
15 ft.
(4572mm)
48"
(1.2m)
12"
(305mm)
CFM141
Fig. 20 Maximum number of 90° elbows is three (3).
Maximum
3' (914mm)
7TDVRT90
Elbow
CFM142
Venting
2/2/01 sta
CFM142
Fig. 21 Maximum horizontal vent run.
V584-201
Horizontal Run
2/99 djt
10 ft.
(3048 mm)
7 ft. 6 in.
(2286 mm)
7 ft.
(2134 mm)
CFM147
Fig. 22 Maximum vent run with elbows.
A + B = 17’ (Max.)
• The maximum number of 45° elbows permitted per
side wall installation is two (2). These elbows can be
installed in either the vertical or horizontal run.
• For each 45° elbow installed in the horizontal run,
the length of the horizontal run MUST be reduced by
18” (45 cm). This does not apply if the 45° elbows
are installed on the vertical part of the vent system.
• The maximum number of elbow degrees in a system
is 270°. (Fig. 23)
CFM132
Fig. 23 Maximum number of elbow degrees.
1
2
3
4
1 + 2 + 3 + 4 = 270
o
CFM132
Insert Rear Vent Sidewall
2/26/01 sta
Example:
Elbow 1 = 90˚
Elbow 2 = 45˚
Elbow 3 = 45˚
Elbow 4 = 90˚
Total angular variation = 270˚
• IMPORTANT •
Minimum clearance between vent pipes and combusti-
ble materials is one (1”) inch (25 mm) on bottom, sides
and top.
Twist Lock Vent Starter Kit 7TDVSK, plus Transition
Elbow 7TDVRT90 must be used in Vertical Sidewall
installations. The 4” pipe must be centered inside
the 7” pipe coming off the transition elbow.
Canadian & USA Installations:
The venting system must conform with local codes, or
in the absence of local codes, with National Fuel Gas
Code, ANSI Z223.1/NFPA 54 - latest edition, or CSA
B149.1 Installation Code.
Only CFM Corporation venting components specifically
approved and labelled for this fireplace may be used.