Constructed in 1968, the 777 Hornby building is located on the northwest corner of Hornby and Robson Street in the downtown core of Vancouver BC. This building has 20 storeys, with restaurants and retail shops located on the ground floor and office space on the upper floors and is classified as a Class B office building.
There are a couple of main reasons that this building is amongst QuadReal’s most energy inefficient facilities. The building’s heating ventilation and air-conditioning (HVAC) system is based on a dual-duct system that runs through the entire building. This system provides heating and cooling to the retail and office portions of the building 7 days a week. The office tower although mostly vacant on weekends cannot be separately heated or cooled from the retail portion of the building, which increases overall energy use of the building. In addition, the building’s glazing includes single-pane windows and lacks insulation, which increases heat losses and gains and overall building energy use.
Through the completion of specific energy conservation measures by QuadReal over the past ten years, the building’s normalized energy use has decreased by almost 30% from its baseline energy use level in 2007.
Past retrofit activities
Throughout the last decade, there have been multiple energy conservation related measures that have been completed at this building including; the replacement of the original boilers with a high-efficient boiler system, the installation dual duct boxes, the upgrade of the building’s direct digital control system, and the retrofit of most of the building’s lighting to more efficient light emitting diode (LED) lighting with improved controls. In addition, operational issues with air leakage through the mixed air plenum was recently fixed. All these measure contributed to 777 Hornby achieving significant energy efficiency improvements in past 10 years.
Future retrofit plans
In 2018, the Operational Analytics platform was established for the building, which is a data analytics approach and retro-commissioning process to drive dramatic performance improvement in a stream-lined, efficient manner.
The retro-commissioning process will help to sustain performance gains over the long-term utilizing data from the building automation system (BAS) and a data-driven approach to optimize building operations. As a result of building performance monitoring and control improvements, the Building Operations Team will be provided with an extra set of eyes and hands on an ongoing basis to continually monitor, maintain, and improve this building’s performance.
In conjunction with the Operational Analytics system, an intensive energy efficiency audit was conducted to identify further operational measures that would be able to improve the building’s energy performance. Multiple operational measures have been identified through this audit process that have the potential to provide further energy reduction improvements at this building.