90 Woodridge (The Fairview)
Project Type: Design-Build & Sustainability Planning
Client: Ferguslea Properties Ltd.
About This Project
Ferguslea developed an asset and investment plan based on substantial common area, lobby, and individual suite renovations. The suite upgrades included replacing balcony window and door systems with energy-efficient units, replacing suite entry doors, upgrading flooring to ceramic tile, and renovating kitchens and bathrooms.
Objectives
In addition to the building renovations, Ferguslea wanted to introduce central air conditioning to The Fairview. Many options were considered, like installing individual suite air conditioning units, installing a chiller, or a more sustainable solution such as a geothermal or ground source heat pump (GSHP).
Ferguslea engaged Pivotal Projects to provide strategic direction and management expertise on the project. Halsall Engineering was appointed to undertake initial research and to make a recommendation on the most suitable option. The client chose to install a centralized GSHP in the building. Although this was the most complex solution, it was the most energy-efficient and kept with the focus on environmental sustainability.
Challenges
- An aggressive nine-month construction schedule that overlapped the design and construction process.
- Delivering a design-build model with a cost guarantee.
- Replacing all piping infrastructure for the new HVAC system.
- Updating the electrical system to support the new geothermal heating and cooling system.
- Building a geo-exchange field using the surface parking area.
- Keeping tenants comfortable and informed during the project.
- Enforcing harmful substance abatement and safety rules.
Solutions
Alliance partnered with a world-renowned expert in geothermal exchange systems, Geoxergy, to develop the design for The Fairview. The energy model results identified the building as heating dominant, requiring more heat than cooling energy throughout the year.
The geo-exchange field was designed to handle all of the cooling and almost all of the heating. When extra heat is required, the boilers inject this into the system. Every aspect of the design was based on energy efficiency, with the base HVAC systems being tied into the new web-based automation system.
- A 200-ton multistack three-module heat pump to provide the heating/cooling water for the building.
- The modular design allowed for it to be installed in the basement of the building, where physical size was key.
- The heating/cooling pumps were designed with variable frequency drives to vary the flow of water based on demand.
- The fresh air make-up unit was also retrofitted to use the heating/cooling water produced by the heat pump.
- All new fan coils with two-way control valves and programmable thermostats were installed in each suite.
Download our case study in PDF format here.
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