Sunlight is a powerful force in architecture, shaping both human well-being and environmental sustainability. When thoughtfully harnessed, it enhances spaces by supporting circadian rhythms, improving visual comfort, and strengthening our connection to nature. However, managing sunlight also presents challenges—excessive glazing can lead to overheating in warmer months, while heat loss through windows becomes a concern in colder seasons. Balancing these factors requires strategic design solutions, from shading and glazing to innovative energy-efficient technologies.

In this solar design series—launched in celebration of Earth Day 2024—we explore how architecture can optimize sunlight to benefit both people and the planet. Associate Erin Broda speaks with Principal Don Schmitt, Principal Nigel Tai, and Senior Associate Haley Zhou highlighting three of Diamond Schmitt’s projects that achieve this balance:

• Myron and Berna Garron Health Sciences Complex: An important gateway to the University of Toronto’s Scarborough Campus, this building is characterized by a dynamic five-story atrium that floods its interiors with natural light—merging energy efficiency with daylight optimization. Building Integrated Photovoltaics (BIPV) clad its exterior, harnessing solar energy that helps power the building, while also using sunlight and changes in weather to animate the facility through the BIPV’s shifting colours.

• The Drake Hotel Modern Wing: This deep urban project features a tight exterior courtyard that has been carved into the middle of the block that draws light into the centre of the sight, alongside a series of glazing approaches. North-facing windows overlook the garden, while a composition of large and small windows play against the Drake’s heritage façade calibrating light within the interior spaces and connecting the Wing to the public realm.  

• The New Vic: A transformative campus project that reimagines the former Royal Victoria Hospital as the new home of McGill University’s Sustainability Systems and Public Policy programs. The use of light was a foundational point in the design of the building given its position on the site – 20 metres lower than the existing condition. Large atriums and skylights illuminate subterranean spaces, while moments between heritage and new build create opportunities to further animate the interior with natural light.