The Alpha building systems are lightweight wood frames, insulated with cellulose in the cavity and wood-fiber board on the exterior. The systems can be used to construct roofs, walls, and floors. While including windows is an option, most clients go for the inclusive package, and the company has a short list of preferred providers that are regular suppliers, such as Alpen and SmartWin. The website features a library of 3D details that architects can download and use to adapt their designs to the Alpha system.
“Every project is potentially a Passive House building,” asserts McDonald, given the composition of their panels. Yet McDonald also points out that the final determinant of a project meeting Passive House performance is what happens on site. To ensure consistent installations, Phoenix Haus generally works with one specific third-party prefab installation firm that travels to each site and has become expert at the on-site details.
Currently the business is concentrated in the single-family home market, although McDonald sees a growing demand for larger developments, such as multiple single-family dwellings on one property and single-family homes with attached second units. “Our DNA is healthy housing and satisfying the needs of multigenerational families—kids and grandparents in one complex,” says McDonald.