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Wander Passive House

  • The Wander House 105 Bayswater Avenue Ottawa, ON, K1Y 2G2 Canada (map)

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In 2016, Mark Rosen, an Ottawa architect and Certified Energy Advisor/Passive House Designer, and Meghan Rosen, a graphic designer, designed and built their home following the principles of the international Passivhaus/Passive House building standard. The most fundamental elements of the standard are super-insulation, extreme air tightness, and very high-efficiency ventilation.

Built on an infill lot in Hintonburg, the house is a single family home that uses roughly 85% less energy for heating than a standard new home. It is built with super-insulated walls, ceilings and floors, and is extremely air-tight (0.46 ACH). It showcases a shallow geo-thermal ground loop, grey-water ready plumbing system, high efficiency ventilation system, and heat pump hot water tank. The Wander House is one of only a handful of houses in Canada to target the rigorous international PassivHaus standard.


Mark Rosen, President, Building Energy Inc.

Mark Rosen is a Certified Energy Evaluator (CEE), a licensed architect (OAA),and a recognized industry expert in the fields of building science and air tightness. Mark has been involved in the field of residential sustainability for over 10 years, and has consulted on, tested, and certified thousands of new homes in the Ottawa area under a variety of green labelling programs (EnergyStar for New Homes, R-2000, LEED, PassivHaus, EnerGuide, Net Zero).

Mark has served on the Energy Star for New Homes technical committee for 7 years (chair in 2013). He is a founding member and one of the directors of the Canadian Association of Consulting Energy Advisors(CACEA) — a newly formed national association that promotes energy efficiency for homes while helping to develop the capacity of the industry to meet ever-changing codes and regulations.

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Earlier Event: September 30
Opening night
Later Event: October 1
Magic of the NAC (Tour 1)