NTI Matrix - Page 11

Vent/Air-inlet Pipe Material
Table 4-2 Acceptable Vent and Air-inlet Pipe Material
Items
1
Materials
2, 3
Installation Standards
All Vent and Air-inlet
materials installed on gas
fired appliances in CAN/US
must meet the Standards
listed in Table 4-2. Failure
to comply could result in
fire, serious injury or death.
United States
Canada
4
Vent Piping
and Fittings
PVC - DWV
ANSI/ASTM D2265
All venting material in
Canada must be
ULC S636 approved.
See Note 4 below for
appropriate temperature
applications.
PVC Schedule 40
ANSI/ASTM D1785
CPVC Schedule 40
ANSI/ASTM F441
AL29-4C
UL-1738
Polypropylene (PP)
-
Pipe Cement
PVC
ANSI/ASTM D2564
CPVC
ANSI/ASTM F493
Primers
PVC / CPVC
ANSI/ASTM F656
Notes:
1
Refer to Table 4-3 for Allowable Vent and Air-inlet Pipe Sizes and Lengths.
2
PVC venting (exhaust and air-intake) is not permitted within the Closet/alcove of a Closet/alcove installation.
3
The Air-inlet does not require high temperature pipe material. Check applicable local codes for acceptable materials.
4
ULC S636 PVC is approved for flue gas temperatures up to 149
o
F (65
o
C) and must only be used for low temperature
applications. High temperature applications requiring boiler supply water temperatures greater than 140
o
F (60
o
C) must
use ULC S636 CPVC, PP or AL29-4C.
The use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®
(polyphenolsulfone) in the exhaust venting system is prohibited. Failure to follow these
instructions may result in property damage, personal injury or death.
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited. Failure
to follow these instructions may result in property damage, personal injury or death.
Vent and Air-inlet Pipe Length Determination
Use Table 4-3 to determine the maximum pipe length that can be used. The table calculates sweep, 90º elbows,
and 45º elbows at 5 equivalent feet each. Note: there are limitations when operating with Propane Gas (LP).
Example: A Matrix can be installed with 105 equivalent feet of air-inlet piping and 105 equivalent feet of
exhaust vent piping when operating with Natural Gas. When operating with Propane Gas (LP), the maximum
length of each the exhaust vent and air-inlet pipe is limited to 50 equivalent feet (3” diameter pipe).
The length of one vent pipe (air-inlet or exhaust) may not exceed the length of the other
vent pipe by more than 20 equivalent feet.
Table 4-3 Allowable Vent and Air-inlet Pipe Size and Lengths
Model
Pipe Size
Gas
Length
ft.
Number of Elbows (90’s or 45’s) and Equivalent Feet
1
2
3
4
5
6
7
8
9
M100 & M100V
3”
LP
50
45
40
35
30
25
20
15
10
5
3”
NG
105
100
95
90
85
80
75
70
65
60
4”
NG
& LP
105
100
95
90
85
80
75
70
65
60