What is ULC S636?

What is ULC S636?

ULC-S636, Standard for Type BH Gas Venting Systems, is the applicable Canadian UL standard for gas-burning, condensing appliance venting. Similar to the USA, venting for Category II-IV appliances can be Type BH venting that is listed to ULC-S636.

Is 636 PVC or CPVC?

CPVC (CHLORINATED POLYVINYL CHLORIDE) System 636 CPVC carries a ULC S636 Class IIB certification and is certified for use up to and including 90°C (194ºF). Ensure the proper System 636 CPVC Cement and Primer is to be used for installation.

Which category appliance requires the use of 636 venting?

Type BH Class IIA vent
System 636 PVC is classified as Type BH Class IIA vent, suitable for use on appliances with flue gas temperatures up to and including 65ºC (149ºF).

Can you use PVC for furnace exhaust?

Suitable materials for the vent and condensate pipes include PVC (polyvinyl chloride), CPVC (chlorinated polyvinyl chloride), and ABS (acrylonitrile-butadiene-styrene) plastic pipe, depending on the furnace’s specified exhaust gas temperature.

Can ABS be used for furnace exhaust?

PVC or ABS plastic piping is often used on high-efficiency heating and water heating systems as vent piping for the exhaust gases, since the exhaust temperatures are relatively low. This piping is often vented out the side of the home.

What is Category 3 vent pipe?

Category III is defined as a gas heating appliance with a flue loss equal or greater than 17% (non-condensing) with a positive vent static pressure. In a Category III venting system, if there is a leak in the venting system, flue gas will flow from the flue pipe into the space.

Do you need primer for 636?

solvent cementing process is beneficial as it allows for deeper penetration of the weld after assembly. In Ontario, primer is mandatory for usage on System 636 for installation temperatures at or below 0ºC, and for installa- tions of 6” and 8” CPVC System 636 in all conditions.

What is the maximum flue gas temperature for 636 PVC vent pipe?

System 636 PVC carries a ULC S636 Class IIA certification and is certified for use up to and including 65°C (149°F). Ensure the proper System 636 PVC Cement and Primer is to be used for installation. System 636 CPVC carries a ULC S636 Class IIB certification and is certified for use up to and including 90°C (194°F).

Why is ABS pipe prohibited in Ontario?

Because ABS is often a recycled or “regrind” plastic resin (to make it cost-competitive with PVC), it was essentially weakened. This caused instances of pipe fatigue and failure which led some areas to ban its use. Essentially, it’s not as durable as once thought.

Can you use foam core PVC for venting furnaces?

The Supplemental Information to the installation instructions for one of the largest manufacturers of cell core PVC piping, Charlotte Pipe, states “Never use PVC or ABS cellular core pipe for combustion gas venting”.

Can you use PVC glue on 636?

Admin. According to IPEX, Section 8(c) refers to IPEX 636 ABS, 636 PVC and 636 CPVC. IPEX states the 636 PVC cement (grey) can be used on the non 636 PVC material.

What is the maximum temperature for 636 approved PVC pipe?

System 636 PVC is listed as Type BH Class IIA venting system with a maximum temperature rating of 65ºC (149ºF). System 636 CPVC is listed as Type BH Class IIB venting system with a maximum temperature rating of 90ºC (194ºF).

What is ULC S636 Type BH?

ULC-S636, Standard for Type BH Gas Venting Systems, is the applicable Canadian UL standard for gas-burning, condensing appliance venting. Similar to the USA, venting for Category II-IV appliances can be Type BH venting that is listed to ULC-S636.

What is ULC S636 certification for vents?

CSA B149.1 Natural Gas and Propane Installation Code now requires all special venting material to be certified to ULC S636 across Canada. IPEX addressed this market need with System 636®, a fully certified flue gas vent system.

What is the ULC code for venting?

UL 1738, Venting Systems for Gas-Burning Appliances, Categories II, III, and IV, and ULC-S636, Standard for Type BH Gas Venting Systems, cover vents in the USA and Canada for a subset of gas-fired products where flue gas temperatures are typically reduced.

Where can I get support with system 636?

iUnparalleled sales support, technical assistance and field training are all readily available from IPEX Sales Professionals across North America. System 636 is backed by IPEX – Canada’s leading plastic pipe system supplier. Visit www.ipexinc.com/system636 for further details. SYSTEM 636®FLUE GAS VENTING