Marc Cregeur Marc Cregeur is a Green Building Consultant and Passive House Rater at Earth Advantage, working with their Single-Family Home Certification Green Building Program. He has been implementing energy efficiency programs for over 10 years, and developing real-world building science experience. This hands-on experience allows Marc to work with builders from the design phase, through construction, and into the final build and testing phase. This versatility has allowed Marc to work with small and large builders: from those looking to simply be above code, to more high-performance projects like Passive Homes, and Zero Energy Homes.