Which appliance type is typically associated with Type B Vents?

Type B vents are specifically designed for venting appliances that produce combustion gases that are moderate in temperature and pressure, typically from gas appliances. These vents are used primarily for category I appliances, which are non-positive venting systems that do not require a fan for venting exhaust gases.

Draft hood appliances, such as traditional furnaces and water heaters with draft hoods, naturally draw air for combustion and exhaust the gases through the chimney. The draft hood is a critical component as it helps to neutralize the pressure and ensures that combustion gases are adequately vented to the outside without creating backdrafts.

In contrast, high-efficiency furnaces utilize condensate drainage systems and often employ PVC or other venting methods, not Type B vents. Water heaters without draft hoods and wall furnaces may have different venting requirements that also do not align with the use of Type B vents, as they may use direct venting systems or other forms of appliance-specific venting.

Thus, the choice/reference to draft hood appliances is the most appropriate for Type B vents, which allows a clear understanding of their function and application in venting systems.