The problem with tall, slender towers
Stark and elegant, the CIBC Tower is often featured on postcards of downtown Montreal. At 225 meters in height, including antenna, it was briefly the tallest tower in Canada when it was opened in 1962. Given that it is very thin in relation to its height, this characteristic created energy efficiency problems.
“The relatively abundant fenestration and the building's significant demands for vertical energy exchanges turned out to be major elements to be considered in our approach to optimization,” comments Alain Beaulieu, Director of Real Estate at Groupe Petra, which manages several office towers offering prestige space downtown. “The project essentially called for upgrading the tower, designed at a time when energy was not an issue, into an efficient building according to the standards of the 21st century,” adds Yan Wilscam, Operations Manager at Groupe Petra.
In 2016, Groupe Petra began a complete recommissioning of the building. “It was a colossal undertaking,” confirms Alain Beaulieu. The project aimed to reduce energy consumption, optimize comfort, and obtain LEED certification for the CIBC Tower without affecting the activities of the 45 corporate tenants.