Final answer:
Type B vents are specifically designed for gas-fired appliances with draft hoods, and are typically used in domestic heating and water systems.
Step-by-step explanation:
Type B vents are vents suitable only for listed, draft hood-equipped, gas-fired appliances, including most domestic heating and hot water systems. These vents are designed to exhaust products of combustion while also providing protection against backdrafts.
Unlike vent systems designed for appliances like wood stoves, which are designed to prevent heat loss, Type B vent pipes are specifically for gas appliances and are typically double-walled to provide insulation and increase safety.
Type B vents are vents suitable only for listed, draft hood-equipped, gas-fired appliances, including most domestic heating and hot water systems. These vents are designed specifically for use with natural gas or propane appliances and are commonly used in residential applications.
Type B vents are made of double-walled metal pipe with an inner layer to carry the exhaust gases and an outer layer to provide insulation and protection. They are typically installed vertically through the roof or horizontally through a side wall, and they require clearances to combustible materials.