What is the primary purpose of a vent for Type B Gas Venting?

The primary purpose of a vent for Type B Gas Venting is to safely expel exhaust from gas appliances. This venting system is designed specifically for the safe removal of combustion gases produced by gas-fired appliances. It channels harmful gases, such as carbon monoxide and others, outside of the building, helping to ensure the safety of the occupants. Proper venting is crucial because it prevents the accumulation of toxic gases indoors, reducing the risk of poisoning and maintaining air quality.

The other options do not accurately capture the primary function of a Type B vent. While enhancing airflow is generally important for combustion, it is not the main goal of these vents. Increasing the temperature of gas is not a function of the vent but may result from the exhaust itself as it exits the appliance. Connecting directly to gas cylinders pertains to gas supply systems rather than venting, which focuses on the safe expulsion of exhaust gases. Thus, the correct answer highlights the essential safety role that Type B Gas Vents play in gas appliance operations.