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. Type BH a is venting designation that is unique to the Canadian market.
What is ul1738?
– UL 1738 is a standard for Venting Systems for Gas-Burning Appliances, Categories II, III, and IV. – It covers both metallic and non-metallic materials and includes over 50 material and system performance tests.
Is PVC A 636?
PVC (POLYVINYL CHLORIDE) System 636 PVC carries a ULC S636 Class IIA certification and is certified for use up to and including 65°C (149ºF).
What is BH vent?
An approved system like type BH vent is defined according to code B149. 1 as: “A vent complying with ULC S636 and consisting entirely of factory-made parts, each designed to be assembled with the others without requiring field fabrication, and intended for venting gas appliances.”
What is Type L vent?
Type L vents are designed for venting approved oil-fired and natural-gas appliances that produce draft hood flue gasses that do not exceed a temperature of 570º F (299º C), or 926º F (299º C) for 10 minutes in an over-fire situation. The minimum clearance from combustible materials is generally 3 inches.
Can ABS be used for furnace exhaust?
ABS. Acrylonitrile Butadiene Styrene (called ABS) is a rigid plastic pipe alternative to PVC. Like PVC, ABS pipes are used for high-efficiency furnace ventilation systems. Like PVC, ABS does not rust, corrode or collect condensate, which makes it a good material for direct vent furnace systems.
Which gas appliance allows for plastic vent materials?
USE OF PLASTIC VENTS Plastic venting systems are commonly used with condensing boilers, furnaces, tankless water heaters, and mechanically vented tanked water heaters. These appliances are listed as Category II, III, and IV appliances.
What PVC 636?
System 636 PVC 1 Natural Gas and Propane Installation Code. System 636 PVC is intended for negative or positive pressure venting and is classified as a “Type BH Class II A 65°C” flue gas vent. System 636 PVC Pipe is white in colour and is made to SCH 40 dimensions.
What is a 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.
What is Type L gas vent pipe?
Type L vents are designed for venting approved oil-fired and natural-gas appliances that produce draft hood flue gasses that do not exceed a temperature of 570º F (299º C), or 926º F (299º C) for 10 minutes in an over-fire situation. Type L vents should not be used to vent coal- or wood-fired appliances.