As housing costs continue to increase in the popular resort town of Whistler, BC, locals have faced a shortage of affordable housing. The Government of Canada, as part of its National Housing Strategy, invested $7.3 million into the construction of a new rental housing building to increase the affordable housing stock in WhistlerThe result is 1020 Legacy Way, a four-story, 18,000-square-foot building that is built to Passive House standards. The building, managed by the Whistler Housing Authority, contains 24 employee housing units, an elevator, underground parkade, shared laundry, and bike storage.   

Our team provided Passive House consulting and airtightness testing services on the new buildingIn addition, our façade structural team provided engineering analysis and design of the exterior glazing.  

Whistler’s alpine climate presented a few design and construction challenges. Vinyl windows were inappropriate for this cold climate, so we used Passive House certified, drained aluminum-clad woodframed windows that improved the heating demand of the building and reduced the surface condensation risk. We used prefabricated wall panels from a controlled manufacturing plant that not only shortened the time needed to fully enclose the building, which reduced the building’s exposure to the elements during construction, but also provided the desired level of airtightness.  

In lieu of several small energy recovery ventilators (ERVs), wopted for one larger centralized ERV with dampers for each unit. This approach cost-effectively increased the building’s ventilation efficiency by lowering the overall annual ventilation rates. Since full cooling could not be feasibly offered to each unit in the building, we included a cooling coil in the centralized ERV  that cools incoming hot outdoor air to cost-effectively moderate the temperature of the building as a whole.  

The key to our work on this project was our team’s holistic understanding of what is required to build a Passive House. Our team applied its knowledge of important design considerations to optimize the building’s performance for the Whistler climate. 

The new building opened in fall 2019 and its certification through the Passive House Institute (PHI) is pendingIt will become the first multifamily Passive House building in Whistler.  

Images provided by Integra Architecture Inc. Photos above and below left by Melvin Lau; photo below right by Sam Mendl.


August 11, 2020


Whistler Housing Authority 


Integra Architecture Inc.

Our Role:

Passive House Consultant

Key Services

Passive House Consulting
Design Assistance

We guide design teams through the Passive House certification process by providing input on design strategies, components, and systems; modeling the building using the Passive House software, and documenting all aspects required for certification.

Brittany Coughlin | MASc., P.Eng., BEMP, CPHC

Regional Director – Canada East, Energy & Climate Specialist
View Bio

Eric Catania | P.Eng.

Principal, Senior Energy & Climate Engineer
View Bio

UBC Okanagan Skeena Residence

UBC Properties Trust, on behalf of the University of British Columbia (UBC), is developing a new student residence on their Okanagan campus referred to as the Skeena Residence.

Read More

Nuutsumuut Lelum (Nanaimo Passive House)

Nanaimo Aboriginal Centre (NAC), in partnership with government agencies and other community organizations, undertook the creation of Nuutsumuut Lelum, a 25-unit rental housing complex for Indigenous families, youth, and Elders, anchored by a communal space for gatherings, celebrations, and other activities.

Read More
RDH Building Science