9
Oxford Direct Vent / Natural Vent Gas Heater
30005123
Vertical Termination - Direct Vent ONLY
A vertical vent system must terminate no less than 8’
(2.44 m) and no more than 40’ (12 m) above the appli-
ance flue collar. A 2
Z\v
” restrictor plate (supplied) must be
used where specified in all vertically terminated vent sys-
tems. (Fig. 8)
NOTE: The restrictor plate supplied with
the vertical termination should be discarded. Install
restrictor plate supplied with stove directly at stove
outlet.
A vertically terminated vent system must also con-
form to the following criteria:
• No more than three 90° elbows may be used.
• Two 45° elbows may be substituted for one 90° elbow.
No more than six elbows may be used.
• Vent must rise a minimum of 2 feet before offset is
used.
• Termination height must conform to roof clearance as
specified in Figure 9.
20
19
18
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
20
1
2
3
4
5
6
7
8 9
10 11 12 13 14 15 16 17 18 19
Vertical Run (in feet)
(Measure from the appliance flue collar to the top of the vent pipe.)
Horizontal Run (in feet)
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
ST132a
FDV28
Vertical
vent run
12/3/99 djt
area
modified
1/11/00 djt
All Vertical Termina-
tions in this area
Require use of the
2
Z\v
” Restrictor Plate*
Vertical terminations
must be within this area
Unacceptable Venting
Configuration
No Restrictor Plate
ST132a
Fig. 8
Vertical vent termination window.
*The Restrictor plate is used on Direct Vent Installations
Only
Vent Termination clearances
When planning the installation, consider the location of
the vent terminal and clearances. Some of the most com-
mon clearances to keep in mind are shown in Figure 10.
Important: All vent clearances must be maintained.
check your vent termination clearances against Fig-
ures 9 through 11.
The vent should be placed so that people cannot be
burned by accidentally touching the vent surfaces when
the stove is operating.
The vent termination should be located where it cannot be
damaged by such things as automobile doors, lawn mow-
ers or snowblowers and it should be located away from
areas where it could become blocked by snow, etc.
Some considerations are:
• Obstructions or impediments to venting.
• Nearby combustible materials that could come into
contact with combustion exhaust gases.
• Other nearby openings {within 12” (305 mm)} through
which exhaust gas could reenter the building.
• All vegetation within 3’ (76 mm) that may interfere with
the draft.
Other factors that influence where the installation will be
sited include the location of outside walls, where addi-
tional heat may be desired in the home, where the family
members gather most regularly, and perhaps most impor-
tantly, the distance limitations of the venting system.
IMpORTANT
Direct Vent Only
• The horizontal termination must not be recessed
into the exterior wall or siding.
• Horizontal vent runs must be level toward the vent
termination.
• Clearances around the vent termination must be
maintained.
• For installations using Simpson DuraVent pipe, par-
allel installations with minimum wall clearance have
restricted access for connecting the Horizontal Vent
Cap straps to the vent pipe. See the maker’s instruc-
tions for recommended installation procedures.
