Installation / Operation Instruction Manual
Page 22
When communicating to the outdoors through horizontal
ducts, each opening shall have a minimum free area
of not less than 1 square inch per 2000 Btu/hr (1100
square mm/kW) of total input rating of all equipment in
the enclosure.
Method 2: One permanent opening, commencing
within 12” (300mm) of the top of the enclosure, shall
be permitted. The opening shall directly communicate
with the outdoors or shall communicate through a
vertical or horizontal duct to the outdoors or spaces that
directly communicate with the outdoors and shall have a
minimum free area of 1 square inch per 3000 Btu/hr (734
square mm/kW) of the total input rating of all equipment
located in the enclosure. This opening must not be less
than the sum of the areas of all vent connectors in the
conned space.
Other methods of introducing combustion and ventilation
Combustion Air From Room In the United States,
the most common requirements specify that the space
shall communicate with the outdoors in accordance
with method 1 or 2, which follow. Where ducts are used,
they shall be of the same cross-sectional area as the
free area of the openings to which they connect.
Method 1: Two permanent openings, one commencing
within 12” (300mm) of the top and one commencing
within 12” (300mm) of the bottom, of the enclosure
shall be provided. The openings shall communicate
directly, or by ducts, with the outdoors or spaces
that freely communicate with the outdoors. When
directly communicating with the outdoors, or when
communicating to the outdoors through vertical ducts,
each opening shall have a minimum free area of 1
square inch per 4000 Btu/hr (550 square mm/kW) of
total input rating of all equipment in the enclosure.
NOTE: “x”, “xx”, and “xxxx” refer to variations in nominal size. See manufacturer’s catalog for a particular application.
Table 5. Allowable Single Wall Stainless Steel Vent Suppliers and Part Numbers
Table 6. Allowable Polypropylene Vent Manufacturers / Trade Names
ALLOWABLE SINGLE WALL STAINLESS STEEL VENT SUPPLIERS AND PART NUMBER
S
Selkirk
DuraVent
NovaFlex
Safe-T Vent EZ Seal FasNSeal Z Flex
90° Elbow 9x14 FSELB90xx 2SVEExx90
Pipe 9x07 FSVLxxxx 2SVEPxxxx
Boiler Adapter 5x01BOI FSAAUx
2SVSAxx (OD)
2SVSTTAxx (ID)
Horizontal Termination
(bird screen) 9x92 FSBSx 2SVSTPXxx
Vertical Termination (rain
cap) 5X00CI FSRCx 2SVSRCxx
Inlet Air Termination 9xTERM FSAIHXX* 2SVSTEXxx90
Adapter, SS to CPVC FSA-xxFNSM-xPVCF
Manufacturer Approved
Hanger Straps
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 66'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 3300'' MMAAXX..
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 66'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 1122'' MMAAXX..
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 44'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 1166'' MMAAXX..
Adapter SS to PP FSAAUx-xPP 2ZDCPVCx**
*4", 6" & 7" only **up to 6"
ALLOWABLE POLYPROPYLENE VENT MANUFACTURERS / TRADE NAME
S
CentroTherm DuraVent
Selkirk
NovaFlex
InnoFlue PolyPro
PolyFlue
Z-Dens
Single Wall Pipe ISVLxxxx xPPS-x 83x002 ZDPx
Elbow ISELxxxx xPPS-E90L 83x08 2ZDEx87
PVC Adapter ISAGLxxxx
xPPS-ADL (to 4")
xPPS-xxPVCM-xPPF (>4")
83x040 2ZDCPVCx
Horizontal Termination
(bird screen)
IASPPxx (2" - 4")
IASSSxx (5" - 12")
xPPS-BG (2" - 6") 83x050 2ZDESx
Vertical Termination
IASPPxx (2" - 4")
IASSSxx (5" - 12")
xPPS-VKL (<5")
xPPS-VTML (5"-8")
83x050 2ZDESx
Air Inlet 2ZDESx
Manufacturer Approved
Hanger Straps
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
3
3
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
6
6
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
5
5
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
1
1
0
0
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
2
2
.
.
5
5
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
1
1
6
6
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
3
3
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
6
6
'
'
M
M
A
A
X
X
.
.
MFR MODEL NUMBER (ABBREVIATED)
MFR MODEL NUMBER (ABBREVIATED)
Trade Name / Model
Example Components
Example Components
Trade Name / Model
ALLOWABLE SINGLE WALL STAINLESS STEEL VENT SUPPLIERS AND PART NUMBER
S
Selkirk
DuraVent
NovaFlex
Safe-T Vent EZ Seal FasNSeal Z Flex
90° Elbow 9x14 FSELB90xx 2SVEExx90
Pipe 9x07 FSVLxxxx 2SVEPxxxx
Boiler Adapter 5x01BOI FSAAUx
2SVSAxx (OD)
2SVSTTAxx (ID)
Horizontal Termination
(bird screen) 9x92 FSBSx 2SVSTPXxx
Vertical Termination (rain
cap) 5X00CI FSRCx 2SVSRCxx
Inlet Air Termination 9xTERM FSAIHXX* 2SVSTEXxx90
Adapter, SS to CPVC FSA-xxFNSM-xPVCF
Manufacturer Approved
Hanger Straps
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
6
6
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
3
3
0
0
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
6
6
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
1
1
2
2
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
H
H
o
o
r
r
i
i
z
z
o
o
n
n
t
t
a
a
l
l
R
R
u
u
n
n
)
)
-
-
4
4
'
'
M
M
A
A
X
X
.
.
Distance between Hanger Straps
(
(
V
V
e
e
r
r
t
t
i
i
c
c
a
a
l
l
R
R
u
u
n
n
)
)
-
-
1
1
6
6
'
'
M
M
A
A
X
X
.
.
Adapter SS to PP FSAAUx-xPP 2ZDCPVCx**
*4", 6" & 7" only **up to 6"
ALLOWABLE POLYPROPYLENE VENT MANUFACTURERS / TRADE NAME
S
CentroTherm DuraVent
Selkirk
NovaFlex
InnoFlue PolyPro
PolyFlue
Z-Dens
Single Wall Pipe ISVLxxxx xPPS-x 83x002 ZDPx
Elbow ISELxxxx xPPS-E90L 83x08 2ZDEx87
PVC Adapter ISAGLxxxx
xPPS-ADL (to 4")
xPPS-xxPVCM-xPPF (>4")
83x040 2ZDCPVCx
Horizontal Termination
(bird screen)
IASPPxx (2" - 4")
IASSSxx (5" - 12")
xPPS-BG (2" - 6") 83x050 2ZDESx
Vertical Termination
IASPPxx (2" - 4")
IASSSxx (5" - 12")
xPPS-VKL (<5")
xPPS-VTML (5"-8")
83x050 2ZDESx
Air Inlet 2ZDESx
Manufacturer Approved
Hanger Straps
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 33'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 66'' MMAAXX..
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 55'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 1100'' MMAAXX..
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 22..55'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 1166'' MMAAXX..
Distance between Hanger Straps
((HHoorriizzoonnttaall RRuunn)) -- 33'' MMAAXX..
Distance between Hanger Straps
((VVeerrttiiccaall RRuunn)) -- 66'' MMAAXX..
MFR MODEL NUMBER (ABBREVIATED)
MFR MODEL NUMBER (ABBREVIATED)
Trade Name / Model
Example Components
Example Components
Trade Name / Model
B
RADFORD
W
HITE