Which component is a draft hood that provides dilution air and is placed to connect the appliance vent to the chimney?

Which component is a draft hood that provides dilution air and is placed to connect the appliance vent to the chimney?

• A. Air inlet
• B. Draft damper
• C. Draft hood
• D. Flue sleeve

Answer: (C)

The draft hood provides dilution air and serves as the connection between the appliance vent and the chimney. It sits at the end of the appliance’s vent connector and creates a transition into the chimney, allowing room air to mix with the combustion gases so they vent safely and without backdraft or spillage. This dilution air helps stabilize the draft and protects against negative pressure drawing room air into the vent. The other components don’t perform this combined role: an air inlet is simply a source of air for combustion or venting but doesn’t connect the vent to the chimney; a draft damper regulates draft but isn’t the conduit to the chimney; a flue sleeve is just the tube or liner, not the dilution hood.

The draft hood provides dilution air and serves as the connection between the appliance vent and the chimney. It sits at the end of the appliance’s vent connector and creates a transition into the chimney, allowing room air to mix with the combustion gases so they vent safely and without backdraft or spillage. This dilution air helps stabilize the draft and protects against negative pressure drawing room air into the vent. The other components don’t perform this combined role: an air inlet is simply a source of air for combustion or venting but doesn’t connect the vent to the chimney; a draft damper regulates draft but isn’t the conduit to the chimney; a flue sleeve is just the tube or liner, not the dilution hood.