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Basics & Theory

Building Science: Sealed Combustion
Building Science describes sealed combustion, where combustion units are completely decoupled from interior environment through use of dedicated outdoor air intake and exhaust ducts connected directly to the unit.
Issues & Performance

BC Safety Authority: Common Venting Systems For Category III Or IV Gas Appliances
BC Safety Authority bulletin Common Venting Systems For Category III Or IV Gas Appliances says CAN/CSA B149.1-10 prohibits common venting of these types of appliances, but describes how such appliances approved for common venting by a recognized certification agency and installed as a sealed combustion system will be considered. (PDF)

BCSA: BC Directive For Plastic Pipe Venting
BC Safety Authority bulletin confirms the existing code provisions which require the use of ULC S636 certified plastic venting, and allows existing venting to be used with new appliances in specified circumstances.

BCSA: Incorrect Venting Could Have Caused CO Poisoning
BC Safety Authority says while conducting a physical assessment of a newly installed fireplace in a residence, a gas safety officer discovered that incorrect venting material had been used. The non-compliance could have resulted in venting issues leading to carbon monoxide poisoning.

Standata: Alberta Bulletin On Gas Venting & ABS/PVC Piping
Alberta Municipal Affairs gas safety bulletin from STANDATA covering direct vent appliances & equipment says the increased application of high efficiency furnaces and hot water tanks in construction has resulted in increased failures due to confusion with similar locations for combustion air and venting piping systems. The accidental installation of ABS/PVC piping on venting outlets that were intended for the combustion air piping is causing venting failures. (PDF)
Procedures

BC Housing: Sidewall Venting of Gas Appliances`
BC Housing bulletin Sidewall Venting of Gas Appliances says. newer modern gas appliances used for space and water heating are increasingly being installed with sidewall venting as it is easier for builders and equipment installers to implement. Proper care and attention are required in the design and installation of the vents in order to ensure that the exhaust is dissipated away from the building and its occupants. (PDF)

BC Safety Authority: Working With Plastic Venting Systems
BC Safety Authority says to be aware that there are several considerations to keep in mind when doing work with gas appliances that use plastic materials in their venting systems.

Building America: Installing Direct Vent Equipment
Building America online solution center describes how to install direct vent equipment, including scope, description, ensuring success, climate, training, CAD, compliance, and more info.

Inspectapedia: Guide To Side Wall Venting & Flues
Inspectapedia online guide provides information on choosing, installing, & troubleshooting through-wall or side-wall venting exhaust devices for heating appliances like oil or gas fired boilers, furnaces, or water heaters.

JLC: Venting & Make Up Air For Heating Appliances
Journal of Light Construction field guide shows proper venting and make up air for heating appliances.

JLC: Venting Heating Appliances For Safety & Efficiency
Journal of Light Construction describes safety and efficiency rules to follow when planning and inspecting any atmospheric-vented combustion appliance. (PDF) Free Registration Required
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