Backdrafting Posted on 3rd November 201522nd October 2020 by ThePD (The Project Definition) Backdrafting is a dramatic event caused through rapid re-introduction of oxygen to combustion that can occur when using several fans or fireplaces. 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 HSE and tagged hse, safety. 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.