What is the primary function of a draft hood in gas equipment?

The primary function of a draft hood in gas equipment is to determine the draft. A draft hood is an important component in gas-fired appliances that helps manage the flow of combustion gases. Its main role is to ensure that there is a proper draft, which is essential for the safe venting of exhaust gases from the appliance into the atmosphere. By allowing air to mix with the exhaust gases, the draft hood helps maintain a balanced pressure that prevents backdrafts and ensures that the combustion products are effectively expelled.

In this context, determining the draft is critical for safety and performance because it affects how well the appliance operates and how effectively it burns fuel. An appropriate draft helps to ensure complete combustion of the gas, reduces the risk of carbon monoxide buildup, and supports overall appliance efficiency.