B149.1-15 Natural gas and propane installation code & FS-XXX-15 Amendments

[Admin]

You can download the FS-XXX-15 Proposed Gaseous Fuels Code Adoption Document - Here

The amendment was to become effective on Jan 1, 2016, but as far as I know no official Orders have been released.

I reviewed the new B149.1-15 code book and will post any changes or additions it has in comparison to the B149.1-10.  The Gaseous Fuels amendment above would supersede the B149.1.15.  The B149.1-15 can be purchased from the CSA Website.

The changes I list below are the sections of the Code book that were marked with the triangle delta symbol.

In this 2015 edition, where a major change or addition to the previous edition of the Code has been made, the clause, table, or figure affected is identified by the symbol delta (*triangle) in the margin. Users of the Code are advised that the change markers in the text are not intended to be all-inclusive and are provided as a convenience only; such markers cannot constitute a comprehensive guide to the revisions made to the Code. Care must therefore be taken not to rely on the change markers to determine the current requirements of the Code. As always, users of the Code must consider the entire Code and any local amendments.

ANSI/LC-4-2012/CSA 6.32-2012
Press-connect metallic fittings for use in fuel gas distribution systems

Boiler — an appliance intended to supply hot liquid or vapour for space-heating, processing, or power purposes; does not include appliances certified as water heaters.

Flue backflow preventer — a system or device used in common venting of positive pressure appliances to prevent the exhaust flue from active appliances sharing the system from flowing back into the vent of dormant or idling appliance(s).

Gas connector — a factory-fabricated assembly consisting of gas conduit and related fittings designed to convey gaseous fuel from a gas supply piping to the gas inlet of an appliance. A gas connector is not intended for vibration isolation, nor expansion or contraction control. For the purposes of this Code, solid gas connector includes
(a) gas connectors for gas appliances that are certified to ANSI Z21.24/CSA 6.10 and are not designed for repeated movement after being connected nor for repeated disconnecting and connecting and are not intended to be used with quick-disconnect devices or convenience outlets;
(b) gas connectors for movable gas appliances that are certified to ANSI Z21.69/CSA 6.16 and are designed for repeated movement on a regular basis and could be used with quick-disconnect devices or gas convenience outlets;
(c) gas connectors for outdoor gas appliances and manufactured homes that are certified to ANSI Z21.75/CSA 6.27 and are designed for supplying gas to an appliance for outdoor installation that is not frequently moved after installation and to the gas inlet on a mobile home; and
(d) gas hose connectors for moveable appliances that are certified to ANSI Z21.101/CSA 8.5 and are designed for repeated movement on a regular basis and must be used with gas convenience outlets.

Gas convenience outlet — a permanently mounted hand-operated device that is certified to ANSI Z21.90/CSA6.24 providing a means for connecting and disconnecting an appliance to the gas supply piping by way of a gas hose or gas connector. The device includes an integral, manually operated gas valve with a non-displaceable valve member so that disconnection can be accomplished only when the manually operated gas valve is in the closed position, and is equipped with
(a) a thermal shut-off that stops the flow of gas within a specified ambient temperature range; and
(b) an optional enclosure.

Direct gas-fired process air heater (DFPAH) — a direct gas-fired air heater that may be capable of either or both of two operating modes:
(a) the ventilation mode, suitable for use when people are present, in which all the products of combustion generated by the gas-burning device are released into the airstream being heated, and whose purpose is to offset building heat loss by heating only incoming outside air; and
(b) the process mode, for use when people are not present, in which the heater may operate as a direct gas-fired heater intended for the drying, baking, or curing of product.

Pipe wrap tape — adhesive tape made of PVC or polyethylene material with minimum thickness of 10 mil (0.3 mm), with an adhesive resistant to water.

Quick-disconnect device — a hand-operated device that is used for connecting and disconnecting either an appliance or a hose or certain types of gas connectors to a gas supply and that is equipped with an automatic means to shut off the gas supply when the device is disconnected, and that is certified to ANSI Z21.41/CSA 6.9.

4.8.1
The installation of gas-burning appliances and supply piping in mobile homes shall be in accordance with CSA Z240.4.1; in a recreational vehicle, it shall comply with the requirements of CSA Z240.4.2.

4.9.2
An appliance, unless certified or approved for installation in a hazardous location, shall not be installed in any location where a flammable vapour, combustible dust or fibres, or an explosive mixture is present.

4.24.1
Natural gas used for fuel purposes supplying an occupied building shall be odorized in accordance with CSA Z662 or be otherwise readily detectable, or the building shall be equipped with an approved means of gas detection.

4.25 Mobile homes and recreational vehicles

4.25.1
Every heating appliance, water heater, or refrigerator installed in a mobile home or a vehicle, other than a canvas-top tent trailer, shall be of the direct-vent appliance type or equivalent, and shall be installed to provide complete separation of the combustion system from the atmosphere of the space provided for living.

4.25.2
A combustion air inlet or flue gas outlet of an appliance or any other vehicle opening shall be located at least 3 ft (1 m) from any engine filler spout or liquid-level gauge of the vehicle if the intake, outlet, or opening is located above or at the same level. If any portion of such inlet, outlet, or opening is located below the spout or fixed-liquid-level gauge, the clearance shall be the sum of the vertical distance below the spout or fixed-liquid-level gauge plus 3 ft (1 m).

4.25.3
Propane vapour, at a pressure not in excess of 13 in w.c. (3.2 kPa), shall be supplied into the piping or tubing supplying any appliance.

4.25.4
An appliance installed in a propane-equipped mobile home or recreational vehicle shall be certified for use with propane.

4.25.5
Provision shall be made to ensure a supply of combustion air for an appliance, other than an appliance of the direct-vent type, as described in Clause 8.

4.25.6
An open door may be used as an alternative means of providing combustion or ventilation air to a wash-mobile or food service vehicle, provided that the door is interlocked to the propane supply to ensure that the door remains open during appliance operation.

4.25.7
A cargo heater shall be installed in a readily accessible location.

4.25.8
A cargo heater shall be protected to prevent damage or impaired operation resulting from the shifting or handling of cargo.

4.25.9
A durable label in both English and French made of a material that is not adversely affected by water, employing an adhesive that is not water soluble, and measuring not less than 4.5 × 5.75 in
(100 × 125 mm) shall be provided. This label shall be located on the vehicle, adjacent to the propane container, and shall be worded as follows:
(a) in English:
WARNING
This system is designed for use with PROPANE only.
DO NOT CONNECT NATURAL GAS TO THIS SYSTEM. Before turning on propane:
• Be certain appliances are certified for propane and are equipped with correct burner orifices.
• Make certain all propane connections have been made tight, all appliance valves are turned off, and any unconnected outlets are capped.
After turning on propane:
• Light all pilots.
• Each connection, including those at appliances, regulators, and cylinders, shall be leak tested periodically with soapy water by the occupant. Never use a lighted match or other flame when checking for leaks.
• Do not leave system turned on or containers connected until system has been proven to be propane-tight.
• Cooking appliances must not be used for space heating.
• When the containers are disconnected, the propane supply line must be capped or plugged.
(b) in French:
AVERTISSEMENT
Cette installation est conçue pour fonctionner au PROPANE seulement.
NE PAS ALIMENTER CETTE INSTALLATION AVEC DU GAZ NATUREL. Avant d'admettre le propane :
• S'assurer que l'appareil est certifié pour fonctionner au propane et qu'il est muni des orifices de brûleur appropriés.
• S'assurer que tous les raccordements sont étanches, que tous les robinets d'appareils sont fermés et que toutes les sorties non raccordées sont bouchées. Après avoir ouvert l'admission de propane :
• Allumer toutes les veilleuses.
• L'occupant doit s'assurer périodiquement, à l'aide d'eau savonneuse, qu'il n'y a aucune fuite aux points de raccordement des appareils, des régulateurs et des bouteilles. Ne jamais utiliser une allumette allumée ou toute autre flamme pour déceler une fuite.
• Ne pas laisser le propane ni les récipients branchés avant de s'être assuré que l'installation ne présente aucune fuite de propane.
• Ne pas utiliser des appareils de cuisson pour réchauffer une pièce.
• Lorsque les récipients sont débranchés, la tuyauterie d'alimentation en propane doit être bouchée.
The words "WARNING" and "PROPANE" and the phrase "DO NOT CONNECT NATURAL GAS TO THIS SYSTEM" (and their equivalents in French) shall be a minimum of 1/4 in (6.4 mm) in height, and the remainder of the wording shall be a minimum of 1/8 in (3.2 mm) in height.

4.25.10
On all vehicles equipped with appliances, a durable label, made of material not adversely affected by water and employing an adhesive that is not water soluble, shall be provided in both English and French. This label shall be attached adjacent to any fuel-filling locations (gasoline, diesel, or NGV) and propane cylinders. The label shall be worded as follows:
(a) in English:
WARNING Engine ignition and all appliance pilot lights shall be turned off before and during refuelling of motor fuel tanks or any mounted propane container.
(b) in French:
AVERTISSEMENT Couper le moteur et toutes les veilleuses des appareils avant et pendant le remplissage des reservoirs de carburant et de tout récipient de propane installé.

The words "WARNING" and "AVERTISSEMENT" shall be a minimum of 1/4 in (6.4 mm) in height, and the remainder of the wording shall be a minimum of 1/8 in (3.2 mm) in height.

Table 5.1
Building under construction using propane or natural gas (construction heater application)
65 (450) Natural gas
25 (175) Propane
65 (450) Natural gas
25 (175) Propane

5.2.2.5
A regulator shall be installed on the vehicle in such a manner that its safe operation will not be impeded by weather conditions, and it shall be protected by a substantial metal or plastic hood of the enclosed style.

5.2.2.6
When provision is made for mounting a cylinder on the A-frame of a vehicle, a rigidly mounted support bracket for mounting the regulator shall be provided. The regulator shall be protected in accordance with Clause 5.2.2.5.

6.2.2
A fitting used with steel pipe shall be
(a) either malleable iron or steel and shall comply with ANSI/ASME B16.3; or
(b) certified to Standard ANSI LC-4/CSA 6.32.

6.9.1
Joints in steel piping shall be threaded, flanged, press-connected, or welded, and shall be as permitted in Clause 6.15.2.

6.9.4
The acceptance criteria for any welds shall be as specified in Clause 7.10.2 of CSA Z662 or other approved methods.

6.9.9
A joint in seamless copper, brass, or steel tubing shall be made by
(a) a flare joint;
(b) an approved fitting, other than a metallic ball sleeve compression-type fitting;
(c) brazing with a material that has a melting point exceeding 1000°F (525 °C); or
(d) a press-connect fitting.

6.11 Appliance connections

6.11.1
(a) Where approved, rigid piping may be used to connect an appliance to the building piping.
(b) A vented appliance shall be connected directly to the gas supply with piping or tubing or by means specified in Clause 6.21.
(c) Corrugated stainless steel tubing (CSST) systems and copper tubing shall only be connected to an appliance secured in place (nonmoveable), or to rigid piping.

6.11.2
An appliance connection shall satisfy one of the following requirements:
(a) An appliance permitted by Clauses 6.20 and 6.21 for use with a gas hose may be connected to the building piping by means of a gas convenience outlet, or by means of a quick-disconnect device, and where a quick-disconnect device is used, a readily accessible manual shut-off valve shall be installed upstream of, and as close as practicable to, the quick-disconnect device.
(b) An appliance permitted by Clauses 6.20 and 6.21 for use with a gas connector that is certified to ANSI Z21.24/CSA 6.10 shall be directly connected to the building piping secure outlet.
(c) An appliance permitted by Clauses 6.20 and 6.21 for use with a gas connector that is certified to ANSI Z21.69/CSA 6.16 may be connected directly to the building piping secure outlet, or by means of a gas convenience outlet, or by means of a quick-disconnect device, and where a quick-disconnect device is used, a readily accessible manual shut-off valve shall be installed upstream of, and as close as practicable to, the quick-disconnect device.
(d) An appliance permitted by Clauses 6.20 and 6.21 for use with a gas connector that is certified to ANSI Z21.101/CSA 8.5 shall be connected to the building piping by means of a gas convenience outlet.

6.11.3
A quick-disconnect device shall not be used to connect appliances indoors in a residential building.

6.11.4
A gas convenience outlet shall be certified to ANSI Z21.90/CSA 6.24.

6.11.5
A quick-disconnect device shall be certified to ANSI Z21.41/CSA 6.9.

6.11.6
An appliance shall be adequately supported and connected to the piping so that there is no undue strain on the connection.

6.15.2
Underground piping systems shall be joined or connected by welding, approved mechanical compression, or press-connect fittings.

6.15.3
Underground tubing systems shall be joined or connected by brazing, approved mechanical compression, or approved flared or press-connect fittings.

6.16.6
To avoid galvanic corrosion, metallic piping or tubing shall be installed in such a manner that it is not in contact with any other dissimilar metallic pipe or structure.

6.16.8
When piping or tubing passes through an exterior wall above ground, it shall be sealed watertight and the portion of piping or tubing that runs through the wall shall be sleeved or double wrapped with a pipe wrap tape.

6.16.9
When piping or tubing passes through masonry or concrete, the portion of piping or tubing that runs through this material shall be sleeved or double wrapped with a pipe wrap tape.

6.17.1
At every care or detention occupancy, commercial, industrial, and assembly building, piping or tubing shall be identified by one of the following:
(a) the entire piping or tubing system shall be painted yellow;
(b) the piping or tubing system shall be provided with yellow banding that has a minimum width of 1 in
(25 mm); or
(c) the piping or tubing system shall be labelled or marked "GAS"* or "PROPANE"†, as applicable, utilizing yellow labels or markings. When identified in accordance with Item (b) or (c), the identification intervals shall not exceed 20 ft (6 m).
*The equivalent French wording is "GAZ".
†The equivalent French wording is "PROPANE".

6.17.2
At every care or detention occupancy, commercial, industrial, and assembly building, where the piping or tubing pressure is in excess of 14 in w.c. (3.5 kPa), both the piping or tubing and the pressure shall be identified at the following locations:
(a) shut-off valves; and
(b) wall, ceiling, and floor penetrations.

6.18.1
A manual shut-off valve shall be of the plug, ball, or eccentric type, and certified for its intended purpose, and it shall not be subjected to either a temperature or a pressure outside of its certified rating range.

6.21.1
A gas connector shall be certified to ANSI Z21.24/CSA 6.10, ANSI Z21.69/CSA 6.16, ANSI Z21.75/CSA 6.27, or ANSI Z21.101/CSA 8.5.

6.21.4
A gas connector certified to ANSI Z21.101/CSA 8.5 may be used to connect an appliance such as a range, refrigerator, or clothes dryer to the building piping.

6.21.5
Commercial cooking appliances certified for use with casters or otherwise subject to movement during cleaning and other large gas utilization equipment that can be moved shall be connected by a certified gas connector that is certified to either ANSI Z21.69/CSA 6.16 or ANSI Z21.101/CSA 8.5.

6.27 Highway vehicles, recreational vehicles, outdoor food service unit, and wash-mobiles

6.27.1
A hose connector rated at not less than 350 psig (2500 kPa) shall be provided between
(a) the cylinder valve outlet and the inlet of the regulator when the regulator is rigidly mounted on a support bracket; or
(b) the regulator outlet and the main propane piping or tubing when the regulator is rigidly fixed to the cylinder valve outlet.

6.27.2
A propane line supplying a furnace in a mobile home may be routed through a combustion-air or fresh-air make-up opening in the furnace base, provided that
(a) the propane piping through the furnace base consists of a single piece; and
(b) any connection to this piping is made above the level of the top of the furnace base and below the lowest level of the floor or furnace base extension.

6.27.3
An individual shut-off valve shall not be required for each appliance in a recreational vehicle.

6.27.4
Hose shall not be used in lieu of piping or tubing but may be used in conjunction with piping or tubing.

6.27.5
Except for the final connection of piping, tubing, or hose to an appliance or for connection to a valve as described in Clause 4.19.2, there shall be no connections in the piping or tubing within a vehicle.

7.2.1.3
Venting and air-supply requirements, as a minimum, shall be provided in accordance with applicable clauses of Clause 8 (excluding Clause 8.5.4) or designed in accordance with any special requirements contained in the manufacturer's instructions. This requirement shall apply to stationary engines and turbines of all inputs, and the ventilation openings shall be arranged to minimize short circuiting of the exhausted and make-up air streams.

7.2.4.2
A stationary engine or turbine shall be equipped with
(a) a certified automatic safety shut-off valve installed immediately upstream of the gas hose connector. The safety shut-off valve shall be certified in accordance with the requirements of ANSI Z21.21/CSA 6.5 for valves marked C/I. It shall be controlled by a vacuum switch, oil pressure switch, or an equivalent device to prevent the flow of gas to the fuel system on the engine or turbine when it is not running;
(b) an automatic speed governor;
(c) a vacuum switch or low-oil-pressure switch;
(d) a zero-governor-type regulator; and
(e) a gas hose, not exceeding 3 ft (1 m) in length, which shall be of a Type I hose connector approved in compliance with CSA CAN/CGA-8.1, where the connector is installed downstream of the automatic safety shut-off valve required under Item (a) and on the upstream side of the zero-governor-type regulator.

7.2.4.3
Where the input to a stationary engine or turbine is in excess of 1 000 000 Btuh (300 kW), an additional automatic safety shut-off valve shall be provided and shall be piped in series and wired in parallel to the automatic safety shut-off valve required in Clause 7.2.4.2. This additional automatic safety shut-off valve may be located upstream of the regulator required by Clause 7.2.4.6.

7.18.10
A torch intended for manual operation shall not be left unattended while in operation.

7.21.8
Outside air dampers or closing louvres not certified as an integral part of the appliance shall be interlocked so that the main burners do not operate until the air dampers are fully open.

7.22 Direct gas-fired process air heaters (DFPAH)

7.22.1
A DFPAH shall be installed only in industrial buildings.

7.22.2
A DFPAH shall not supply air to an area where sleeping accommodation is provided.

7.22.3
A DFPAH shall be certified to be in compliance with ANSI Z83.25/CSA 3.19.

7.22.4
A DFPAH shall be installed with a clearance from combustible material not less than that marked on the rating plate. See also Clause 4.14.2.

7.22.5
A DFPAH can have two operating modes, ventilation and/or process:
(a) In ventilation mode, the space supplied by the DFPAH can be occupied, and all make-up supply air to a DFPAH capable of operating in ventilation mode shall be ducted directly from outdoors when in ventilation mode.
(b) In process mode, the space supplied by the DFPAH shall not be occupied and re-circulation of air from the space served is allowed.

7.22.6
The design of the installation shall include adequate provisions to permit a non-recirculating DFPAH in ventilation mode to operate at its rated capacity, taking into account the structure's designed exfiltration rate, by providing properly designed relief openings or an interlocked powered exhaust system, or a combination of these methods. Where the installation is dependent upon exfiltration through the building envelope or through relief openings, the structure's designed exfiltration rate and the size of relief openings shall be determined by a professional engineer. Relief openings shall be louvres or counterbalanced gravity dampers. Motorized dampers or closable louvres may be used, provided that they are interlocked so that the main burners do not operate until the air dampers are fully open.

7.22.7
The total air replacement of an installation in a spray booth shall not exceed the total exhaust capacity of the booth.

7.22.8
In a spray booth application, an interlock shall be provided to lock out the spraying equipment unless the DFPAH is operated in the ventilation mode

7.22.9
In a spray booth application, an interlock shall be provided to initiate the operation of the DFPAH fan in conjunction with the operation of the exhaust fan.

7.22 Direct gas-fired process air heaters (DFPAH)

7.22.1
A DFPAH shall be installed only in industrial buildings.

7.22.2
A DFPAH shall not supply air to an area where sleeping accommodation is provided.

7.22.3
A DFPAH shall be certified to be in compliance with ANSI Z83.25/CSA 3.19.

7.22.4
A DFPAH shall be installed with a clearance from combustible material not less than that marked on the rating plate. See also Clause 4.14.2.

7.22.5
A DFPAH can have two operating modes, ventilation and/or process:
(a) In ventilation mode, the space supplied by the DFPAH can be occupied, and all make-up supply air to a DFPAH capable of operating in ventilation mode shall be ducted directly from outdoors when in ventilation mode.
(b) In process mode, the space supplied by the DFPAH shall not be occupied and re-circulation of air from the space served is allowed.

7.22.6
The design of the installation shall include adequate provisions to permit a non-recirculating DFPAH in ventilation mode to operate at its rated capacity, taking into account the structure's designed exfiltration rate, by providing properly designed relief openings or an interlocked powered exhaust system, or a combination of these methods. Where the installation is dependent upon exfiltration through the building envelope or through relief openings, the structure's designed exfiltration rate and the size of relief openings shall be determined by a professional engineer. Relief openings shall be louvres or counterbalanced gravity dampers. Motorized dampers or closable louvres may be used, provided that they are interlocked so that the main burners do not operate until the air dampers are fully open.

7.22.7
The total air replacement of an installation in a spray booth shall not exceed the total exhaust capacity of the booth.

7.22.8
In a spray booth application, an interlock shall be provided to lock out the spraying equipment unless the DFPAH is operated in the ventilation mode

7.22.9
In a spray booth application, an interlock shall be provided to initiate the operation of the DFPAH fan in conjunction with the operation of the exhaust fan.

7.22.10
In a spray booth application, the inlet ducting, when used, shall be purged with at least four air changes prior to an ignition attempt.

7.22.11
In a spray booth application that also has a bake or drying cycle, an interlock shall be provided to lockout the booth lighting and the spraying equipment.

7.22.12
In a process application, an interlock shall be provided to ensure the DFPAH is operated in the ventilation mode for an minimum of 3 min or a minimum of four air changes of the spray booth volume, whichever is greater, at the start of the bake or drying cycle with the spraying equipment locked out.

7.22.13
In a process application, an interlock for access points, such as a door or partition, shall be provided to ensure the DFPAH is operated in the ventilation mode for an minimum of 3 min or a minimum of four air changes of the process space served, whichever is greater.

7.22.14
In process applications that are intended to be entered by personnel following a bake or drying cycle, the controls shall include a post-purge timer to purge contaminants from the space and cool the products to avoid a burn hazard. The length of the post-purge period shall be field adjustable to accommodate the specifics of that particular application.

7.22.15
Outside air dampers or closing louvres not certified as an integral part of the appliance shall be interlocked so that the main burners do not operate until the air dampers are fully open.

7.22.16
A DFPAH shall be located not less than 20 ft (6 m) horizontally from a vertical plane in which combustible gas, vapour, or dust is present.

7.27.6
Except for direct-vent water heaters, when the water heater is used in a combo heating system, return-air inlets shall not be installed in the same enclosure that contains both an air-handling unit and the water heater. Adequate combustion air shall be provided for the water heater.

8.2.4
An outdoor air supply, if required, shall be sized in accordance with Clause 8.2.5 and shall be provided for an enclosure or a structure in which an appliance is installed when the enclosure or structure is neither constructed as described in Clause 8.2.1(a) nor complies with Clause 8.2.1(b).
Note: Determining an outdoor air supply requirement is made using Table 8.3 for appliances having draft control devices and Table 8.4 for appliances not having draft control devices. (Refer to Clause 8.2.5.)

8.3.4
A certified combustion-air supply device may be used in lieu of a duct to provide the outside air supply to an appliance as required in Clauses 8.2.1 and 8.2.4. The combustion-air supply system shall have air flow proving interlocked to the appliance(s) served, and sufficient airflow shall be demonstrated.

8.8.2
When adequate air supply is provided for combustion air for all appliances by a make-up air heater and the appliances are interlocked with the heater, the requirements of Clauses 8.1 to 8.6 shall not apply.

8.10.6
An appliance that operates at a positive vent pressure shall not be connected to a venting system serving any other appliance (common vent), except for cases in which all of the following conditions are met:
(a) All the appliances sharing the vent are of the same type and manufacturer.
(b) All the appliances are certified by the manufacturer for application in common vent configurations.
(c) The venting system is sized appropriately by the appliance manufacturer or in accordance with its instructions and as such is considered a special venting system as defined in Clause 3.
(d) The venting components are either supplied or as recommended by the appliance manufacturer.
(e) A method of flue backflow prevention is present in either the appliance or vent for each appliance and is installed in accordance with the appliance manufacturer's instructions.
(f) The manufacturer's operation and installation instructions shall include common venting specific instructions.
(g) The special venting system or unique feature(s) necessary for common venting application shall be in accordance with the applicable ANSI or CSA standards for the specific appliance type, ANSI Z21.13- 2004 and CSA 4.9 being the case for boilers.

8.14.13
The vent from one or more gas-fired appliances may be installed vertically inside a dormant masonry flue, a dormant certified chimney, or a dormant vent, provided that
(a) each appliance is equipped with its own individual vent or common stack(s), as is the case with common vented appliance sets meeting the requirements of Clause 8.10.6, installed in accordance with the requirements of Clauses 8.12 to 8.14, as applicable; and
(b) spacers are installed to maintain a minimum clearance of 1 in (25 mm) between an active vent and a combustible vent.  The space surrounding any vent shall not be used to convey flue gases for any other appliance.

8.16 Vents and chimneys serving two or more appliances
Note: Clauses 8.16.1 and 8.16.2 apply to common venting of non-positive vent Category I and II appliances. Refer to Clause 8.10.6 for common vent application of Category III and IV positive vent pressure appliances.

8.20 Size and height of interconnected vent connectors Two or more vent connectors may be joined through a common vent connector, provided that
(a) each vent connector has the greatest possible rise consistent with the headroom available and has the required clearances from combustible material;
(b) the size of each vent connector is in accordance with Clauses 8.18.5 and 8.18.7; and
(c) in the case of positive pressure appliances, the appliance or common vent system meets the requirements of Clause 8.10.6, as applicable.

H = pressure drop, in w.c. (Pa)
*For further details on the formulas, refer to B.C. Shebeko, Polyflo Flow Computer, 1974, available from Polyflo Computer Company, Box 50126, Dallas, Texas 75250, USA.
†For values for natural gas, refer to Manual for Determination of Supercompressibility Factors for Natural Gas, available from the American Gas Association, 1515 Wilson Boulevard, Arlington, Virginia 22209, USA.
For values for liquefied petroleum gases, refer to Engineering Data Book, available from Gas Processors Association,
1812 First Place, Tulsa, Oklahoma 74102, USA.

Annex D (informative)
Customer's meter and regulator installations

[Admin]

It looks like the spectral response codes from the Building Code are not being adopted into the Gas Code.

http://www.hvactechgroup.com/hvacforum/index.php?topic=1782.0

[Admin]

The FS-XXX-15 is wrong when it revokes Clause 7.32.5.  That was the case with the B149.1-10, but in the B149.1-15 Clause 7.32.5 becomes Clause 7.33.5.  So FS-XXX-15 should revoke Clause 7.33.5 and not Clause 7.32.5.

FS-XXX-15 is wrong when it revokes Clause 7.25.7.  It should revoke Clause 7.26.7.

FS-XXX-15 is wrong when it revokes Clause 7.26.1.  It should revoke Clause 7.27.1.

FS-XXX-15 is wrong when it revokes Clause 7.26.7.  It should revoke Clause 7.27.6.  Actually the B149.1-15 Clause 7.27.6 is already worded the same as Clause 7.26.7 from the B149.1-10 FS-212-14, so CAD FS-XXX-15 Section 1.35 should be eliminated.

FS-XXX-15 is wrong when it revokes Clause 7.33.3.  It should revoke Clause 7.34.3.

[Admin]

The B149.1-10 Clause 7.26.5 does not seem to exist in the B149.1-15.

Clause 7.26.5 - A direct-vent water heater shall have a minimum access clearance of 3 ft (900 mm) on the burner side.

I wish there was an easier way to determine which Clauses no longer exist if they aren't shown as being revoked.  :frustrated:

Here is a reply from CSA,

You are correct that clause 7.26.5 was deleted from the B149.1-15 Code. I will share with you the rationale...

7.26.5
A direct-vent water heater shall have a minimum access clearance of 3 ft (900 mm) on the burner side.

Rationale: Docket # B149.1 7.26.5 - Due to redundancy Delete present clause 7.26.5 – This clause was placed in the code in 1980 within the water heater section rather than within a chart that listed appliances within the accessibility section for unknown reasons. This chart was subsequently abandoned as present accessibility section and manufacturer's instructions were deemed adequate.

Your observation regarding the delta symbols is correct. They only indicate additions or revisions to the Code, but deletions are not shown.

Additional information, similar to what is shown above, is available in the B149.1 interactive code, but not in the code book itself.

[Admin]

The B149.1.15 with FS-225-17 Amendments become effective July 1, 2017.

Download the CAD FS-225-17 here,

https://www.hvactechgroup.com/article.php/20170415000731170

[Admin]

I found a couple of Clauses that were changed in the B149.1-10 TSSA amendments FS-212-14, but do not seem to be included in the B149.1-15 or the TSSA FS-225-17 amendments.

Clause 8.13.1.

Clause 8.13.2.

[Admin]

Apparently the changes to Clauses 8.13.1 and 8.13.2 were not significant enough to adopt to the B149.1-15 / FS-225-17 amendments.  Both Clauses 8.13.1 and 8.13.2(b)(ii) say,

engineered venting tables acceptable to the authority having jurisdiction.

The B149.1-10 / FS-212-14 revised this to say,

engineering methods acceptable to the authority having jurisdiction;

The B149.1-15 / FS-225-17 will not adopt this change.


The B149.1-10 / FS-212-14 amended Annex C by adding Clause C.2.17 (This is the same as the C.2.16 substituted below).  The B149.1-15 / FS-225-17 revoked Clause C.2.16 and substituted with C.2.16.  There is no Clause C.2.17 in the B149.1-15.

REVOKED -

C.2.16 - When the vent table permits more than one diameter of pipe to be used for a vent connector or vent, the smallest permitted diameter shall be preferred.

SUBSTITUTED -

C.2.16
For Single Appliance Venting Applications:
Where the vertical vent has a larger diameter than the vent connector, the vertical vent diameter shall be used to determine the minimum vent capacity and the vent connector diameter shall be used to determine the maximum vent capacity. The flow area of the vertical vent shall not exceed 7 times the flow area of the listed appliance categorized vent area, flue collar area, or draft hood outlet area unless designed with approved engineering methods.

For Multiple Appliances Venting Applications:
Where 2 or more appliances are connected to a vertical vent or chimney the flow area of the largest section of vertical vent or chimney shall not exceed 7 times the flow area of smallest listed appliance categorized vent area, flue collar area, or draft hood outlet area unless designed with approved engineering methods.

[Admin]

I missed a change,

Added sub-clause (c) to 6.18.3.2 to include another not readily accessible location for shut-off valve

6.18.3.2
The requirement for a manual shut-off valve specified in Clause 6.18.2 (b) to be readily accessible may be waived when it is located:
(a) behind a residential gas range; and/or
(b) behind a residential gas clothes dryer
(c) not exceeding a height of 9 ft from the floor level

[Admin]

Here's a change that wasn't marked with the triangle delta symbol.

B149.1-10:

Clause 7.13.1 - A central furnace shall be installed on a firm, level, noncombustible floor or support, except where the furnace is
(a) certified for installation on a combustible floor;
(b) installed using the furnace manufacturer's special base; or
(c) installed as specified in Clause 4.13.3.

B149-1.15:

Clause 7.13.1 A central furnace shall be installed on
(a) a firm, level base; and
(b) a noncombustible floor or support, except where the furnace is
(i) certified for installation on a combustible floor;
(ii) installed using the central furnace manufacturer's certified special base; or
(iii) installed as specified in Clause 4.13.3.

[walker]

Here's a change that wasn't marked with the triangle delta symbol.

B149.1-10:

Clause 7.13.1 - A central furnace shall be installed on a firm, level, noncombustible floor or support, except where the furnace is
(a) certified for installation on a combustible floor;
(b) installed using the furnace manufacturer's special base; or
(c) installed as specified in Clause 4.13.3.

B149-1.15:

Clause 7.13.1 A central furnace shall be installed on
(a) a firm, level base; and
(b) a noncombustible floor or support, except where the furnace is
(i) certified for installation on a combustible floor;
(ii) installed using the central furnace manufacturer's certified special base; or
(iii) installed as specified in Clause 4.13.3.

how about these furnace blocks?

https://www.diversitech.com/item/id/14908

I've had discussions with other tech over the use of these, in my opinion they are made of a combustible material and cannot be used unless its certified for installation on a combustible floor. 

What is other peoples view on these.

[DaveP]

I would consider this product combustible but i wouldn't use them...

- not a firm level base, it only supports the corners
- someone could kick them out, and its a tripping hazard, anyone could catch their foot under the open spaces and fall.

Highly doubt that would pass an Enbridge new meter turn on, they give you a hard time about more than one patio slab under the furnace unless they are secured together with cement/epoxy/tapcons, or furnaces overhanging existing poured bases.

[Admin]

I have also heard these aren't accepted by the TSSA.  Even if a furnace is approved for installation on a wood floor you still need to satisfy Clause 4.13.3.

Clause 4.13.3 - An appliance with an input up to and including 400 000 Btuh (120 kW) and certified for installation on noncombustible flooring may be installed on a floor constructed of combustible material, provided that
(a) the floor is protected with at least two continuous courses of 4 in (100 mm) thick hollow masonry units covered with sheet metal at least 0.0195 in (0.56 mm) thick;
(b) the masonry units are arranged so that the hollow cores will permit air circulation through them; and
(c) the base as specified in Items (a) and (b) extends not less than 6 in (150 mm) beyond the sides of the appliance.

[walker]

I would consider this product combustible but i wouldn't use them...

- not a firm level base, it only supports the corners
- someone could kick them out, and its a tripping hazard, anyone could catch their foot under the open spaces and fall.

Highly doubt that would pass an Enbridge new meter turn on, they give you a hard time about more than one patio slab under the furnace unless they are secured together with cement/epoxy/tapcons, or furnaces overhanging existing poured bases.

I'm seeing them being used in new construction in Union gas territory. 

[DaveP]

Well that really surprises me that they are allowing it.  I'm sure it wouldn't fly here with Enbridge

[DaveP]

Even if a furnace is approved for installation on a wood floor you still need to satisfy Clause 4.13.3.

I wouldn't read it that way,
4.13.3 -

certified for installation on noncombustible flooring may be installed on a floor constructed of combustible

in other words if it NOT certified for combustible flooring, it may be installed on combustible floor if you follow 4.13.3

I think the key word in 7.13.1 is the or in (ii)
 

Clause 7.13.1 A central furnace shall be installed on
(a) a firm, level base; and
(b) a noncombustible floor or support, except where the furnace is
(i) certified for installation on a combustible floor;
(ii) installed using the central furnace manufacturer's certified special base; or
(iii) installed as specified in Clause 4.13.3.

This is what two of our brands say...

• Furnaces for upflow installation on combustible flooring shall not
be installed directly on carpeting, tile or other combustible material
other than wood flooring.

• Ensure upflow or horizontal furnaces are not
installed directly on carpeting, or any other
combustible material. The only combustible
material allowed is wood.

Downflow requires a certified base, upflow no

So i see no problem on wood, and the 4.13.3 would apply IF it was going on a combustible other than wood, or not certified for combustible flooring in any way.

[Admin]

I always install the furnace on a concrete floor and don't deal with this often.  I agree with you.  A Lennox furnace can be installed directly on a wood floor.

I misread Clause 4.13.3 to say a furnace certified for installation on a combustible floor...but it says noncombustible floor.  What you're saying makes perfect sense.

[Admin]

I found a mistake in the CSA B149.1-15.

AMENDED - Clause 7.32.4
Except where permitted by Clauses 4.13.2 and 7.32.5 to 7.32.7, a residential-type range shall have the following minimum clearances from combustible material:
(a) above — 30 in (750 mm); and
(b) back and sides — 6 in (150 mm).

It should refer to Clauses 7.33.5 to 7.33.7, not 7.32.5 to 7.32.7.  I guess they forgot they changed Clauses 7.32.xx to Clauses 7.33.xx.