Stuart Fix is the Principal of ReNü Engineering Inc. He is a professional mechanical engineer (University of Alberta 2006) with a master’s degree in building science (Ryerson University 2010) and holds certification as a Passive House Designer in both Germany and North America.

Stuart is a founder of Passive Buildings Canada and has been one of Canada's passive house pioneers. Stuart has a background in machine design and project management, and has been active in high-performance building design since 2008, having worked on more than 750 projects. He focuses on leading edge mechanical design, building electrification, and is fascinated with the integration of mechanical and envelope systems in the pursuit of cost effective energy efficiency.

Stuart is an accomplished technical designer and an experienced contributor to inter-disciplinary groups in a global setting. Stuart has served on the Phius Technical Committee since 2011.