Draft Hood Posted on 8th November 201525th July 2021 by ThePD (The Project Definition) A Draft Hood is a device used to facilitate the escape of combustion products from the combustion chamber. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Engineering and tagged hvac. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.