                                         2026 INFORMATIVE DOCUMENT



                                      CSA B149.1:25
This Informative Document provides helpful information relevant to the code.



Contents
3 Deﬁnitions ................................................................................................................ 1
      Combustible.......................................................................................................... 1
      Non-combustible ................................................................................................... 1
      Combination system ............................................................................................. 1
      Manufactured or mobile home............................................................................... 1
      Modular or ready to move (RTM) homes ................................................................ 2
      Outdoors ............................................................................................................... 2
      Permanently Open ................................................................................................. 3
4 General ..................................................................................................................... 3
   4.4 Training and quality of labour ............................................................................. 3
      4.4.3 Permit .......................................................................................................... 3
      4.4.4 Plan review ................................................................................................... 3
   4.5 Suitability of use................................................................................................. 4
      4.5.5.2 Flooding inspection qualiﬁcations .............................................................. 4
   4.23 Protection of appliances from physical damage................................................ 4
      4.23.1 Conditions .................................................................................................. 4
6 Gas piping systems ................................................................................................... 4
   6.2 Material .............................................................................................................. 4
      6.2.14.1 Stainless Steel ......................................................................................... 4
   6.3 Size .................................................................................................................... 4
      6.3.1.1 Use of capacity tables for sizing of piping and tubing ................................. 4
      6.3.6.1 Pressure drop ............................................................................................ 5
      6.3.6.2 Schedule 80 pipe capacity .......................................................................... 6
   6.9 Joints and connections ...................................................................................... 6
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      6.9.3.1 Welding requirements ................................................................................ 6
      6.9.4.1 QC program ............................................................................................... 7
   6.15 Underground piping and tubing ......................................................................... 7
      6.15.17 Horizontal directional drilling ..................................................................... 7
   6.18 Manual shut-off valves ..................................................................................... 7
      6.18.1.1 Liquid propane ......................................................................................... 7
   6.20 Gas hose and ﬁttings ........................................................................................ 8
      6.20.9 Hoses for torches ....................................................................................... 8
7 Installations of speciﬁc types of appliances .............................................................. 8
   7.1 Boilers ................................................................................................................ 8
      7.1.5 Requirements for boilers not requiring registration with TSASK ...................... 8
      7.1.5.3 Pressure relief valves ................................................................................. 9
   7.2.3 Emergency generators..................................................................................... 9
      7.2.3.1.1 Sign ........................................................................................................ 9
   7.2.5 Additional requirements for gas engines and turbines in buildings ................ 10
      7.2.5.3.1 Acceptable construction ....................................................................... 10
   7.13 Central furnaces ............................................................................................. 10
      7.13.8 Plenum protection .................................................................................... 10
   7.23 Infrared Heaters ............................................................................................. 10
      7.23.1.1 Worksheet ............................................................................................. 10
      7.23.3.1 Acceptable methods .............................................................................. 10
   7.25 Decorative appliances and gas logs ................................................................ 11
      7.25.1.1 Vented gas ﬁreplace heaters installation ................................................ 11
   8.24 Venting arrangements .................................................................................... 12
      8.24.5 Unvented heaters ...................................................................................... 12
   8.30 Venting of appliances into canopies ............................................................... 12
      8.30.5 Applications ............................................................................................. 12
Appendix A – Sizing ................................................................................................... 13
   Actual length/actual load ....................................................................................... 13
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     Pipe sizing method example (imperial) ................................................................ 13
  Actual length/actual load ....................................................................................... 14
     Pipe sizing method example (metric) ................................................................... 14
  Table A.2 c) [Sch 80] ............................................................................................... 15
  Table A.3 c) [Sch 80] ............................................................................................... 16
  Table A.4 c) [Sch 80] ............................................................................................... 17
  Table A.5 c) [Sch 80] ............................................................................................... 18
  Table A.6 c) [Sch 80] ............................................................................................... 19
  Table A.7 c) [Sch 80] ............................................................................................... 20
  Table A.18 a) [3 psig] .............................................................................................. 21
  Table B.13 [Liquid Propane]..................................................................................... 22
Appendix B – Appliance vent termination................................................................... 24
  8.14.8 Vent termination limitations ......................................................................... 25
Appendix C – Termination of vent lines ...................................................................... 27
  5.6 Termination of vent lines ................................................................................... 27
     Table 5.3 ............................................................................................................. 27
Appendix D – Test pressures for steel pipe ................................................................ 32
  Test pressures for steel pipe ................................................................................... 32
Appendix E – Emergency ﬂood guidelines .................................................................. 34
Appendix F - Worksheet for unvented heaters in livestock and poultry barns ............. 36
  Worksheet for Unvented Heaters in Livestock and Poultry Barns .............................. 36
     Worksheet........................................................................................................... 37
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3 Deﬁnitions
Combustible
materials made of, or surfaced with, wood, compressed paper, plant ﬁbers, or other
materials that are capable of being ignited and burned; such material shall be
considered combustible even though ﬂame-proof, ﬁre-retardant treated, plastered, or
part of the construction of a ﬁre-rated barrier.



Non-combustible
material that conforms to CAN/ULC-S114, Standard Method of Test for Determination
of Non-Combustibility in Building Materials; to pass this test, the sample cannot ﬂame
or cause a temperature rise within an oven at 750°C; any building material containing
even a small proportion of combustibles will be classiﬁed as combustible when
subjected to this test.



Combination system
an installation that combines both potable hot water and hydronic space heating.



Manufactured or mobile home
a transportable, single or multiple section single family dwelling conforming to the
CAN/CSA – Z240 MH, Series of Standards, Manufactured Homes, at time of
manufacture; it is ready for occupancy upon completion of setup in accordance with
required factory recommended installation instructions; these structures are required to
have all gas ﬁred appliances installed in accordance with CAN/CSA – Z240 MH, Series
of Standards, Manufactured Homes, per CSA B149.1:25 Clause 4.8.1; all appliances
must be certiﬁed for installation in Canada.




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Modular or ready to move (RTM) homes
are constructed to The National Building Code, and the installation of the gas
appliances conforms to the B149.1:25 Natural Gas and Propane Installation Code;
modular or RTM homes certiﬁed through CAN/CSA - A - 277, Procedure for Certiﬁcation
of Prefabricated Buildings, Modules, and Panels, covers the installation of hidden or
closed-in gas components (gas piping and venting) and require no additional inspection;
if the modular or RTM home is not certiﬁed to CAN/CSA - A - 277, the inspection of the
hidden or closed-in gas components shall be inspected to conform with the B149.1:25
Natural Gas and Propane Installation Code; all appliances must be certiﬁed for
installation in Canada.

      Note: Some modular or RTM homes come with furnaces certiﬁed for
      manufactured or mobile homes. These furnaces typically do not have return air
      ducting. Usually, the central hallway serves as the return air path. Because of this,
      any other gas appliance installed must have its' combustion process separate from
      the living space.



Outdoors
for the purpose of the TSASK CSA B149.1:25 Informative Document, an appliance that
is certiﬁed for outdoor use is considered to be outdoors if installed with shelter no more
inclusive than:

   a) with walls on all sides, but with no overhead cover; or
   b) within a partial enclosure that includes an overhead cover and up to three side
      walls, as long as 30% or more of the total horizontal perimeter of the enclosure is
      permanently open.




For example, consider a 10'x10' space versus a 10' x 15' space, each open to one side,
as shown above.


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Permanently Open
for the purpose of the TSASK CSA B149.1:25 Informative Document, a sidewall is
considered to be permanently open if constructed with shelter no more inclusive than:

   a) for natural gas;
     i)   solid or air-restrictive construction (railings, lattice, etc.) is permitted only
          within the lowest vertical 4' from ﬂoor level to guard rail; and
    ii)   the remaining area of the sidewall located vertically above 4' is permanently
          open or screened, except for roof support columns.
   b) for propane;
     i)   no solid or air-restrictive construction is permitted. Railings must not be air-
          restrictive in construction.

If any of the space (above 4' from the ﬂoor for natural gas) is equipped with glass,
panels, shutters, blinds, curtains or draperies, even temporarily, then these walls can no
longer be considered permanently open. Outdoor gas-ﬁred appliances may then need to
be relocated as appropriate.




4 General
4.4 Training and quality of labour
4.4.3 Permit
No person shall apply for a permit to install any works to which the Gas Inspection Act
applies unless they have the requisite license in Saskatchewan from TSASK Gas
Licensing to do so. No person shall commence any work to which this Act applies
unless the person has been issued a permit from Gas Inspections authorizing the work
to commence.

      Note: The Gas Licensing Regulations stipulate that the holder of a domestic
      contractor's license may undertake work only on installations where the total
      combined gas load (connected to one meter or delivery point) does not exceed
      700 000 Btu/h and individual appliance load does not exceed 400 000 Btu/h.

4.4.4 Plan review
All systems exceeding 2000 feet of piping (in a single run) and all systems having an
input rating exceeding 5 000 000 Btu/h (as listed on a New or Addition permit) are
subject to a Plan Review by Gas Inspections prior to commencement.


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4.5 Suitability of use
4.5.5.2 Flooding inspection qualiﬁcations
A Saskatchewan licensed gas ﬁtter is an acceptable person to conduct an inspection
pursuant to CSA B149.1:25 Clause 4.5.5. For appliances, accessories, components, and
equipment exposed to ﬂooding, they shall refer to the Emergency Flood Guidelines in
Appendix D.



4.23 Protection of appliances from physical damage
4.23.1 Conditions
When appliances are installed in locations that do not afford protection from damage
from motor vehicles, they shall be protected by posts or guardrails in compliance with
CSA B149.1:25 Clause 6.16.15 or other equivalent means of acceptable protection.




6 Gas piping systems
6.2 Material
6.2.14.1 Stainless Steel
Examples of other permissible materials which meet or exceed the minimum
acceptable performance standards for gas piping and ﬁttings listed in CSA B149.1:25
Clause 6.2 include ASTM 312 stainless steel piping, and ASTM A182 stainless steel
ﬂanges, ﬁttings, and valves commonly used in an aggressively corrosive environment
such as potash or salt facilities.



6.3 Size
6.3.1.1 Use of capacity tables for sizing of piping and tubing
As per CSA B149.1:25 Clause 6.3, the gas piping system shall be of suﬃcient size as
determined by

   a) the formulas in clause A.3.5 of CSA B149.1:25,
   b) the capacity tables provided in Annex A of CSA B149.1:25, and/or



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   c) the capacity tables provided in Appendix A of the TSASK CSA B149.1:25
      Informative Document.

The method used in the application of the formulas or capacity tables may be either

   a) the Total Length/Total Load method as described in Annex A of CSA B149.1:25,
      or
   b) the Actual Length/Actual Load method as described in Appendix A of the TSASK
      CSA B149.1:25 Informative Document.

For the maximum capacity of schedule 40 piping, or plastic pipe, with an inlet pressure
of 3 psig based on a pressure drop of 2 psig, refer to Table A.18 a) in Appendix A of the
TSASK CSA B149.1:25 Informative Document.

For the maximum capacity of liquid propane copper tubing or schedule 80 piping which
is gravity fed from a propane tank (not using a pump), refer to Table B.13 in Appendix A
of the TSASK CSA B149.1:25 Informative Document.

6.3.6.1 Pressure drop
For natural gas installations with a designed delivery pressure of 7 inches water
column. The maximum allowable pressure drop is 0.5 inches water column.

For propane installations with designed delivery pressure of 11 inches water column,
the maximum allowable pressure drop is 1 inch water column.




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6.3.6.2 Schedule 80 pipe capacity
Where Schedule 80 pipe is used in natural gas or propane vapour service, Schedule 80
pipe has a lower capacity than that provided in the capacity tables for Schedule 40 pipe.

The capacity tables A.1 through A.7 in CSA B149.1:25 can be used for Schedule 80 pipe
by using the following derating factors:

NPS ¾ sch 40 pipe – take the value from the table and multiply by 0.76

NPS 1 sch 40 pipe – take the value from the table and multiply by 0.78

NPS 1 ¼ sch 40 pipe – take the value from the table and multiply by 0.82

NPS 1 ½ sch 40 pipe – take the value from the table and multiply by 0.83

NPS 2 sch 40 pipe – take the value from the table and multiply by 0.84

NPS 2 ½ sch 40 pipe – take the value from the table and multiply by 0.85

NPS 3 sch 40 pipe – take the value from the table and multiply by 0.86

NPS 4 sch 40 pipe – take the value from the table and multiply by 0.87

These factors are identical for each table (A.1 through A.7). For reference, these
derated values for Schedule 80 pipe are provided as Tables A.1 c) to A.7 c) in Appendix
A of the TSASK CSA B149.1:25 Informative Document.



6.9 Joints and connections
6.9.3.1 Welding requirements
Welding of gas piping within Saskatchewan shall be performed in accordance with a
procedure supplied to and approved by the Chief Gas Inspector. Welding procedures,
registered with the Technical Safety Authority of Saskatchewan (TSASK), are
acceptable. Welding of gas piping shall be performed by an operator qualiﬁed under the
applicable welding procedure. Documentation of welder registration in the province,
territory, state or country shall be provided to and approved by the Chief Gas Inspector.




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6.9.4.1 QC program
All welding projects shall conform to the installer's Quality Control (QC) Program, which
has been developed following the principles of an appropriate standard, and shall be
documented with a copy submitted to The Chief Gas Inspector. The QC Program shall
contain records of welding procedures, qualiﬁcation of personnel, weld schedules,
repair schedules, and inspection reports.



6.15 Underground piping and tubing
6.15.17 Horizontal directional drilling
The installer shall ensure that the gas piping systems installed by Horizontal Directional
Drilling are not subject to a pull strength (lbs) exceeding the piping manufacturer’s
maximum pull over time speciﬁcations, or the values in the table shown below.



Allowable Tensile Loads for HDPE, MDPE, Steel Pipe Sizes at 73°F (23°C) & Pull
Duration of 1 Hour or Less

 O.D.          MDPE          MDPE         HDPE        HDPE       Sch 40       Sch 80
               SDR 11        SDR 9        SDR 11      SDR 9
 ½             191           228          235         280        323          404
 ¾             307           367          378         451        430          548
 1             467           558          575         687        632          804
 1¼            744           889          916         1095       854          1113
 1½            974           1164         1200        1434       1020         1349
 2             1524          1821         1875        2241       1367         1808
 3             3309          3924         4072        4867       2824         3815
 4             5470          6563         6732        8045       4021         5576
* Plastic Pipe Institute TN-63 Safe Pull Strength (2021)



6.18 Manual shut-off valves
6.18.1.1 Liquid propane
Manual shut-off valves on liquid propane piping systems shall be certiﬁed to UL 125 or
approved for use with liquid propane.




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6.20 Gas hose and ﬁttings
6.20.9 Hoses for torches
In propane applications, one or several gas hoses may be run from a tank and/or
vaporizer that is installed outdoors at ground level to provide vapour propane to
portable torches for temporary rooﬁng operations on the roof of a building under the
following conditions:

   a) where the torches are certiﬁed with a rated working pressure of at least 350 psig,
      100% tank vapour pressure may be used without the need for a regulator. Where
      a vaporizer is used, the downstream hose pressure shall be regulated and
      protected to not exceed 90% of the lowest torch rated working pressure.
   b) no hose shall exceed 100 ft in length, in accordance with CSA B149.1:25 Clause
      6.20.3
   c) means shall be provided to prevent the liqueﬁcation of propane between the tank
      and any portable torch. One acceptable means is to depressurize the supply
      system by closing the tank valve while at least one torch on the roof remains lit,
      until it is extinguished.




7 Installations of speciﬁc types of appliances
7.1 Boilers
7.1.5 Requirements for boilers not requiring registration with TSASK
These requirements apply to any boiler installation which is exempt from design
registration with the Technical Safety Authority of Saskatchewan (TSASK) under the
Boiler and Pressure Vessel Act and Regulations, such as;

   •   Low pressure boilers with heating surfaces of 32.3 ft² (3 m²) or less; or
   •   High pressure boilers with heating surfaces of 21.5 ft² (2 m²) or less.




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7.1.5.3 Pressure relief valves
Pressure relief valves shall be installed so as to stand in an upright position, with the
spindle vertical and;

   a) discharge outlets shall extend downwards, and shall have the same internal
      diameter as the relief valve opening, and
   b) terminate no more than 12 in (300 mm), nor less than twice the internal diameter
      of the discharge pipe, off the ﬂoor. The end of the discharge pipe shall not be
      threaded or provided with a ﬁtting, which could allow the discharge pipe to be
      blocked or restricted.



7.2.3 Emergency generators
7.2.3.1.1 Sign
The sign referenced in CSA B149.1 Clause 7.2.3.1 shall conform to requirements in CSA
C282, Emergency Electrical Power Supply for Buildings, or otherwise meet the following
speciﬁcations:




       Note: The appropriate fuel must be identiﬁed.

       Color code: yellow background with black lettering




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7.2.5 Additional requirements for gas engines and turbines in
buildings
7.2.5.3.1 Acceptable construction
Examples of acceptable construction for walls with a 2-hour ﬁre resistance rating
includes:

   a) brick construction – minimum 4 in thick.
   b) wood stud framing, 16 in on centre, mineral-ﬁbre insulated between studs and
      covered with gypsum board drywall, minimum 1in thickness on each side (such
      as two ½ in thick gypsum boards, overlayed on each side).
   c) minimum 2.5 in thickness of gypsum drywall sandwiched between metal
      cladding on each side.

   Source: Appendix D of The National Building Code 2020



7.13 Central furnaces
7.13.8 Plenum protection
A furnace that is permanently installed where there is only a return air ﬁlter, or warm air
plenum with take offs, shall have both the return air ﬁlter and warm air plenum outlets
protected against an inﬂux of waste or discarded material.



7.23 Infrared Heaters
7.23.1.1 Worksheet
For a worksheet to calculate compliance to code for unvented heaters in livestock and
poultry barns, see Appendix H.

7.23.3.1 Acceptable methods
Acceptable means of maintaining clearance:

   a) photoelectric sensor which is interlocked to shut off the heater;
   b) cement barriers to prevent encroachment into clearance area;
   c) 1 in (25 mm) Schedule 40 black pipe hung at appropriate level; or




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   d) other effective barriers which must receive prior approval.




7.25 Decorative appliances and gas logs
7.25.1.1 Vented gas ﬁreplace heaters installation
All gas ﬁreplaces and heaters that are certiﬁed to CSA 2.33 Vented Gas Fireplace
Heaters have special requirements when it comes to clearances to combustibles. The
standards under which these ﬁreplaces and heaters are constructed contain the
deﬁnitions for "Combustible" and "Non-combustible" found in the Deﬁnitions section of
the TSASK CSA B149.1:25 Informative Document.

Ensure that any material placed within the zone speciﬁed by the heater/ﬁreplace
manufacturer for non-combustible material has only non-combustible material installed.
As an example, cement board and steel sheets are considered non-combustible. Fire-
rated drywall or gypsum wallboard is considered combustible and cannot be used in a
non-combustible material zone. Any material that does not meet this strict requirement
for non-combustible will have to be replaced.




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8.24 Venting arrangements
8.24.5 Unvented heaters
For a worksheet to calculate compliance to code for unvented heaters in livestock and
poultry barns, see Appendix E.



8.30 Venting of appliances into canopies
8.30.5 Applications
The practice of permitting an exhaust hood to act as the venting of appliances that
require venting is now restricted to only those appliances with ﬂue outlets located
directly under the exhaust hood per CSA B149.1 clause 8.30.1(c). The past practice of
locating an appliance adjacently and venting this appliance horizontally by cutting into,
or terminating the vent under, an exhaust hood is not permitted.




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Appendix A – Sizing
Actual length/actual load
Pipe sizing method example (imperial)




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Actual length/actual load
Pipe sizing method example (metric)




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Table A.2 c) [Sch 80]




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Table A.3 c) [Sch 80]




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Table A.4 c) [Sch 80]




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Table A.5 c) [Sch 80]




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Table A.6 c) [Sch 80]




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Table A.7 c) [Sch 80]




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Table A.18 a) [3 psig]




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Table B.13 [Liquid Propane]
Maximum capacity of liquid propane (in thousands of Btu/h) for copper tubing or
schedule 80 piping, gravity fed from a propane tank (no pump).




Flow rates are based on Darcy's equation with 20% reduction due to minor internal
ﬂashing of liquid in the piping. Calculation assumes turbulent ﬂow, a pressure drop of 1
psig, and the weight density of propane taken at O°F.

Flow rates shown in brackets (red italics) are considered too low to be protected by a
single 4 USGPM excess ﬂow valve mounted on the tank, per TSASK CSA B149.2
Informative Document Clause 7.4.8.1, and shall not be considered for single line
services to a single appliance.




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Any line utilized for propane ﬂow shall have a ﬂow capacity to atmosphere greater than
the design ﬂow rate of the excess-ﬂow valve protecting the line, or have a vapour ﬂow
capacity based on Annex B of CSA B149.1, or a liquid ﬂow capacity based on Appendix
A of the TSASK CSA B149.1:25 Informative Document, of at least 75% of the rated
capacity of the excess ﬂow valve protecting the line.




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Appendix B – Appliance vent termination




      Appliance vent termination and regulator discharge clearances



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8.14.8 Vent termination limitations
A vent shall not terminate

  (A) where it may cause hazardous frost or ice accumulations on adjacent property
      surfaces.
  (B) less than 7 ft (2.1 m) above a paved public sidewalk or driveway that is located on
      public property.
  (C) less than 6 ft (1.8 m) of a mechanical air-supply inlet to any building.
  (D) above a regulator within 3 ft (900 mm) horizontally of the vertical centerline of the
      regulator vent outlet to a maximum vertical distance of 15 ft (4.5 m);
  (E) except as required in 8.14.8 d), any distance less than detailed in Table 5.3
  (F) less than 1 ft (300mm) above grade.
  (G) less than the following distances of a window or door that can be opened in any
      building, of any nonmechanical air-supply inlet to any building, or of the
      combustion air inlet of any other appliance:
          i)  6 in (150 mm) for inputs up to including 10 000 Btu/h (3 kW);
         ii)  12 in (300 mm) for inputs 10 000 Btu/h (3 kW) up to including 100 000
              Btu/h (30 kW); and
        iii)  3 ft (0.9 m) for inputs exceeding 100 000 Btu/h (30 kW); and
  (H) underneath a veranda, porch or deck unless
          i)  the veranda, porch, or deck is fully open on a minimum of two sides
              beneath the ﬂoor; and
         ii)  the distance between the top of the vent termination and the underside of
              the veranda, porch, or deck is greater than 1 ft (300 mm);
        iii)  the 1 ft (300 mm) min. clearance to the underside of the veranda, porch, or
              deck shall be measured from the top of the vent to the bottom of the
              joists;
  (I) through a sidewall above a pedestrian doorway;
  (J) less than 4 ft (1.2 m) below a ventilated soﬃt unless speciﬁed as per the
      manufacturer’s instructions. For unvented soﬃts follow manufacturer’s
      installation instructions;

  (K) 8.14.2 Vent minimum distances

      Except for a special venting system with positive vent pressure, a vent shall
      extend not less than 2 ft (600 mm) above the highest point where it passes
      through a ﬂat roof of a building and not less than 2 ft (600 mm) higher than any
      portion of a building within a horizontal distance of 10 ft (3 m).



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  (L) 8.14.3 Positive vent pressure minimum distances

       A vent used in a special venting system with positive vent pressure and passing
       through a roof shall extend at least 18 in (450 mm) above the highest point
       where it passes through the roof surface and the same distance above any other
       obstruction within a horizontal distance of 18 in (450 mm).

  (M) 8.14.5 Pitched roof distances *

       Except for a special venting system with positive vent pressure, a vent passing
       through a pitched roof shall extend above the highest point where it passes
       through a roof surface in accordance with Figure 8.1 and shall extend not less
       than 2 ft (600 mm) above any obstruction within a horizontal distance of 10 ft (3
       m).

  (N) 8.14.14 Property Clearance (TSASK CSA B149.1:25 Interpretations)

       A vent from a Category IV appliance:

          a) shall not pass through an exterior wall and terminate adjacent to the
              exterior wall unless there is a minimum unobstructed distance of 4 ft
              (1.2m) or greater from the foundation to the property line of the adjacent
              lot;
          b) that terminates into a side yard which measures not less than 4 ft (1.2m),
              and not greater than 8 ft (2.4m), from the foundation wall to the property
              line of the adjacent lot, shall have a means of redirecting the vent plume
              with a certiﬁed ﬁtting such as a tee, a 90 degree elbow or a termination
              acceptable to the Authority Having Jurisdiction, installed in accordance
              with the manufacturer's installation instructions; and
          c) that terminates into a side yard which measures greater than 8 ft (2.4m),
              from the foundation wall to the property line of the adjacent lot will not
              require redirection.
   (O) 5.6 Termination of vent lines

       Except where permitted by Clauses 5.5.1.4 and 5.5.4, the vent line from
       overpressure protection devices, relief devices, and internal relief valves, and the
       termination of any other vent line not eligible to be vented into a ventilated
       space shall terminate outdoors with the clearances speciﬁed in Table 5.3.

*Exposed lengths of B Vent shall be installed in an adequately insulated chase.




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Appendix C – Termination of vent lines
5.6 Termination of vent lines
Except where permitted by Clauses 5.5.1.4 and 5.5.4, the vent line from overpressure protection devices,
relief devices, and internal relief valves, and the termination of any other vent line not eligible to be vented
into a ventilated space shall terminate outdoors with the clearances speciﬁed in Table 5.3.

Table 5.3
Clearance from vent line and bleed vent terminations, ft (m)

                             A Column                    B Column                    C Column                    D Column
                             Natural gas and             Natural gas and             Natural gas and             Propane relief
                             hydrogen-natural            hydrogen-natural            hydrogen-natural            vents and bleed
                             gas blend vents             gas blend relief            gas blend relief            vents
                             (relief or bleed) ≤         vents (relief or            vents (relief or
                             50 ft³/h (1.5 m³/h)         bleed) > 50 ft³/h           bleed) > 1900
                                                         (1.5 m³/h) and ≤            ft³/h (55 m³/h)
                                                         1900 ft³/h (55
                                                         m³/h)
 Building opening *          1 (0.3)                     3 (0.9)                     10 (3)                      3 (0.9)

 Appliance vent              Dimension A                 3 (0.9)                     Dimension B                 Dimension B
 outlet †
 Moisture exhaust            3 (0.9)                     3 (0.9)                     3 (0.9)                     3 (0.9)
 duct ‡
 Mechanical air              3 (0.9)                     10 (3)                      10 (3)                      10 (3)
 intake
 Appliance air               1 (0.3)                     3 (0.9)                     10 (3)                      10 (3)
 intake
 Source of ignition          1 (0.3)                     3 (0.9)                     3 (0.9)                     5 (1.5)

Notes:
 Dimension A = 1 ft (0.3 m) in any direction from the vent termination of a gas appliance, and additionally 3 ft (0.9 m) horizontally
 when within a vertical distance of 15 ft (4.6 m) between the appliance vent termination and the gas vent termination.

 Dimension B = 3 ft (0.9 m) in any direction from the vent termination of a gas appliance, and additionally 0.9 m (3 ft) horizontally when
 within a vertical distance of 15 ft (4.6 m) between the appliance vent termination and the gas vent termination.
 * Outdoor air intakes that are less than 8 in (200 mm) in diameter or equivalent area shall be considered a building opening in using
 this table.
 † See also Clause 8.14.8.
 ‡ Applies to gas or electric dryer termination.
 Note: The outdoor air intake referred to in this table is the ducting that goes from the outside of the structure and terminates into the
 return air plenum before the appliance, sometimes referred to as a “fresh-air intake“.
 Note: CSA Z662 speciﬁes the necessary minimum clearances from the vent of a regulator or an associated overpressure relief device
 that belongs to a utility or propane supplier is required to building features similar to those shown in this table. Annex D contains a
 reprinting of the mandated clearances speciﬁed in CSA Z662. Piping and appliance installers and repairers and other construction
 trades are reminded to maintain these clearances when planning and executing work.
 Note: CSA B149.2 speciﬁes the minimum clearances from the propane containers to a source of ignition.




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Appendix D – Test pressures for steel pipe
Test pressures for steel pipe
Maximum allowable air or nitrogen test pressures for steel pipe (seamless or ERW) to
limit hoop stress to 30% of the speciﬁed minimum yield strength (SMYS) per CSA Z662
Clause 4.3.5.




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Notes: % SMYS = (Sh) / SMYS x100 where:
Speciﬁed Minimum Yield Strength (SMYS) = CSA Z245.1 Category I Pipe Grade in megapascals (MPa)
Design Hoop Stress (Sh) = (P x D) / (2 x tn ) x F x L x J x T
Test Pressure (P) is calculated in MPa and converted to psig. 1 MPa = 1000 kilopascals (kPa)
Wall Thickness (tn) and Outside Diameter (D) are measured in millimetres
Design Factor (F) = 0.8 per CSA Z662 Clause 4.3.5.1
Location Factor (L) = 0.5 per Z662 clause 4.3.5.1
Joint Factor (J) = 1.0 per Z662 clause 4.3.5.1 since ERW Pipe is limited to 57% of SMYS per 8.2.4.3 and 0.6
times 57% is 34% thus 30% with a joint factor of 1.0 remains conservative for both seamless and ERW.
Temperature Factor (T) = 1.0 per Z662 clause 4.3.5.1
Test pressures exceeding these limits must meet the requirements of TSASK CSA B149.1:25 Interpretations
Clause 6.22.2.2.




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Appendix E – Emergency ﬂood guidelines
REVISION: July 2019                                For Licensed Gas Contractors                                       PAGE: 1 of 2

APPENDIX G Flooding in the province of Saskatchewan can occur from the following ways:
       1. Waterway spillover.

       2. Flash Floods.

       3. City, town or village water/sewer system failures

       4. Single home ﬂooding stream water system failures & sewage backup

When ﬂooding occurs damage to property can be extensive. The safe operation of gas appliances is a priority for Gas Inspections.
To ensure this, Gas Inspections enforces The B149.1 National Gas and Propane Installation Code requirement for gas appliances
that are involved in a ﬂood;

4.5.5 Damaged appliances and piping

   Appliances, accessories, components, equipment, piping and tubing that have been exposed to ﬁre, explosion, ﬂood, or other
   damage shall not be offered for sale, installed, reactivated, or reconnected to the supply until the appliance, accessory,
   component, equipment, piping or tubing has been inspected by a person acceptable to the authority having jurisdiction. The
   inspection of piping or tubing exposed to ﬂood shall include a check for water in the piping or tubing system. (Water depth over
   7” can back feed through a gas valve.)

   Note: In Saskatchewan, a licensed gas ﬁtter is acceptable to the Authority Having Jurisdiction.
Any gas-ﬁred appliance found to be unsuitable for continued use shall have its rating plate removed by the licensed gas ﬁtter.
Gas-ﬁred appliances without a rating plate are no longer certiﬁed and cannot be installed or reinstalled.
Procedure for Single Property Flooding:
  1.     Gas suppliers may isolate area ﬂooded and Red Tag affected appliance(s) or property.

  2.     Buildings affected by ﬂooding must have their entire gas system inspected by a licensed gas contractor and have affected
         gas appliances serviced or replaced. Contractors must follow the Red Tag process in cases where necessary corrections are
         identiﬁed but not yet conducted. The local gas inspector will provide advice to contractors and homeowners as required.

  3.     Listed on the following page are common gas appliances and the corresponding required action depending on the ﬂood
         condition. For other gas-ﬁred appliances, contact the local gas inspector for advice. For gas inspector and electrical
         inspector contact information call: Toll-free 1-866-530-8599

Procedure for Multiple Property Flooding:

Gas Inspections requires the Red Tag process to be followed for reporting and documentation of all ﬂood damaged appliances for
all properties affected.

  1.     Local Gas Inspector in conjunction with local gas utility will coordinate start-up of affected areas to ensure public safety. For
         properties that have been shut-off but have no required corrections to the gas system or appliances, the local gas inspector
         will authorize reactivation of the service – no permit or air test is required.

  2.     Public will be advised through the EMO Centre that, when returning to their homes, they:

         a) Have a licensed gas contractor inspect gas-ﬁred equipment and have it serviced as necessary, and

         b) If they smell gas upon returning home, leave immediately and notify appropriate authorities – i.e. for natural gas –
            SaskEnergy 1-888-700-0427, for propane contact 911 and their propane supplier.

  3.     Local Gas Inspector will advise local gas contractors to hang an air test veriﬁcation tag on the meter and to phone-in
         applicable permit numbers to the utility before the utility turns the gas on to the home or facility.

  4.     Local Gas Inspector will advise Homeowners to apply to SaskEnergy for a meter activation.




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REVISION: July 2019                  For Licensed Gas Contractors                             PAGE: 2 of 2

  Gas appliance                            Condition                                            Solution
                        Completely submerged                                        Replace furnace
                        Flooded above gas valve or burner                           Replace furnace
                                                                                    Replace fan assembly or
                        Wet, or in contact with fan blade assembly
                                                                                    replace furnace
Furnace                                                                             Replace fan motor or replace
                        Wet, or in contact with fan motor
                                                                                    furnace
                                                                                    Replace electronic board or
                        Wet, or in contact with electronic components
                                                                                    replace furnace
                        Floor wetness not in contact with fan or
                                                                                    Service and test
                        electronic components
                        Completely submerged                                        Replace water heater
                        Flooded above gas valve, or burner                          Replace affected components
                        (non FVIR water heaters only)                               or replace water heater
Storage water
heater                  Flooded above FVIR sensor or arrestor screen
                                                                                    Replace water heater
                        (FVIR-equipped water heaters)
                        Floor wetness not in contact with gas valve,
                                                                                    Service and test
                        burner or FVIR components
Tankless                Completely submerged                                        Replace water heater
(instantaneous)         Flooded above gas valve, burner or electronic               Replace affected components
water heater            components                                                  or replace water heater
                        Completely submerged                                        Replace clothes dryer
                        Flooded above gas valve, burner or electronic               Replace affected components
Clothes dryer           components                                                  or replace clothes dryer
                        Floor wetness not in contact with gas valve,
                                                                                    Service and test
                        burner or electronic components
                        Completely submerged                                        Replace ﬁreplace
                        Flooded above gas valve, burner or electronic               Replace affected components
Fireplace               components                                                  or replace ﬁreplace
                        Floor wetness not in contact with gas valve,
                                                                                    Service and test
                        burner or electronic components
                        Completely submerged                                        Replace boiler
                        Flooded above gas valve, burner or electronic               Replace affected components
Boiler                  components                                                  or replace boiler
                        Floor wetness not in contact with gas valve,
                                                                                    Service and test
                        burner or electronic components


Note: Appliances that have been removed for replacement due to ﬂooding shall have their rating plates removed, and
then the appliances shall be scrapped as a non-certiﬁed appliance.

Note: Health concerns caused by the release of water or sewage into ductwork or insulation are the responsibility of the
Health Authority and must be addressed by the local health inspector.




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Appendix F - Worksheet for unvented heaters in
livestock and poultry barns
Worksheet for Unvented Heaters in Livestock and Poultry Barns
Livestock ventilation systems with propane and natural gas appliances have to meet the
Natural Gas and Propane Installation Code CSA-B149.1:25. This worksheet is designed
to assist in the calculations to meet code speciﬁcs of CSA B149.1:25 Clauses 7.23.1
and 8.24.5. All requirements of CSA B149.1:25 must be in compliance, including
Clauses 4.9, 7.23 and 8.24 in their entirety including all sub-clauses. This worksheet is
an aid-only for the following two calculations:

      7.23.1 Where an infrared heater is of the unvented type, it shall

             (e) be provided with mechanical ventilation that

                    (ii) has a ventilation volume of at least 300 cfm (142 dm³/s) for each
                    100 000 Btu/h (30 kW) input or fraction thereof;

      Note: 300 cfm per 100 000 Btu/h input (or fraction thereof) is the minimum
      ventilation volume acceptable to Gas Inspections to meet the standard of the term,
      "adequately ventilated space", used in CSA B149.1:25, particularly Clause 8.24.5.

      8.24.5 When located in a large and adequately ventilated space, an appliance may
      be operated by discharging the combustion products directly into the space,
      subject to the approval of the authority having jurisdiction and provided that the
      maximum input of the appliance does not exceed 20 Btu/h/ft³ (0.2 kW/m³) of the
      space in which the appliance is located.




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Worksheet
A) Barn Owner: _______________________________________________________________________________________

B) Barn Land Location: ________________________________________________________________________________

C) Barn Occupancy (# of animals, type of animal): ______________________________________________________

D) Barn Dimensions: ________________ ft X_________________ ft X_______________ ft (high) = Barn volume (E)

E) Barn Volume (E): __________________________ cubic feet

F) Description of Heaters (number/type): ______________________________________________________________

  ____________________________________________________________________________________________________

G) Total Heaters Combined Input into Barn (G): ___________________________________________________Btu/h

H) Description of Ventilation Equipment (number/type): ________________________________________________

  ____________________________________________________________________________________________________

I) Minimum Ventilation Rate of All Ventilation Equipment Combined (I): _____________________________CFM

J) Ratio of min. ventilation rate to heaters’ input = (I) divided by (G) [Must be at least 0.003 CFM per
Btu/h]: ________________________________________________________________________________________________

  ____________________________CFM per Btu/h. NOTE: 0.003 CFM per Btu/h = 300 CFM per 100,000 Btu/h

K) Ratio of heaters input to barn volume = (G) divided by (E) [must not exceed 20 btu/hr per cubic foot):

  _____________________________________________________________________________20 btu/hr per cubic foot

L) Calculations veriﬁed by Licensed Gas Contractor: (please print)

Gas Fitter License #: _______________________Gas Fitter Name: __________________________________________

M) Date of Veriﬁcation: Month: _____________________Day: _______________________Year: __________________




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