[](http://vanairdesign.com/) Canadian students developed an interior door that helps equalize air pressure between adjacent rooms, and then founded a company to market it. The VanAir door helps to facilitate air movement within a building, allowing for a reduction in ducting and space allocated to building services. This simplifies building design and provides specifiers with higher degree of design flexibility. As a result, the VanAir Door creates value for new construction and retrofit projects.