Before designing its newest branch, Canadian Western Bank commissioned a feasibility study by Revolve Engineering to study the applicability of geothermal heating and cooling to their newest branch in Winnipeg, Manitoba. Based on favourable numbers from the report, the bank went ahead with the design of an 8 hole (400 foot depth) geothermal system tied to a distributed heat pump system which provides heating and cooling to the 670 m2 branch. The local geological conditions in Winnipeg required a deeper geothermal system to be utilized as a shallow limestone bedrock layer prevented the installation of a shallow closed loop system - not enough land area was available. An open system utilizing an aquifer that sits on the bedrock layer was also analyzed but the design team chose a deep closed loop system because of the increased life span and reduced maintenance.
The installed geothermal system will utilize 72% less energy than a traditional system and will reduce greenhouse gas emissions by 10.5 tonnes per year.
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