Energy Performance Contract: Measure G14 - Ocean Based Heat Pump for Building D201- Canadian Forces Base Halifax

As part of the Government of Canada's commitment to grow our economy by making significant new investments in green infrastructure and clean technologies, the DND launched the Energy Performance Contract program to enhance the energy efficiency of Canadian Armed Forces bases across Canada. This open loop seawater heating and cooling system will involve the transfer of energy directly from water taken from Halifax Harbour to the heating and cooling system of building D201 via a titanium plate heat exchanger. The seawater will be used for free cooling in summer and heat pump heating all winter. Seawater will be drawn to the heat exchangers though an intake pipe located in Halifax Harbour. As the cold energy is removed from the water at the heat exchanger, the water temperature will increase. The seawater return pipeline will discharge to Halifax Harbour via an outlet pipe. The water will be returned to the harbour at a temperature approximately two degrees higher than when withdrawn and at a higher depth then where it was removed, ideally where ambient water temperature is in the same range as the outfall temperature. The outfall pipe will be placed below the low water mark. The titanium heat exchanger is planned to be in building D201, and land-based pumps will move the seawater to and from the building. Intake and outfall pipelines will be protected from damage in the water with specifically designed structures, and there will be screens to prevent intake of debris and marine biota. It is not anticipated that the intake or outfall pipelines will affect the use of Halifax Harbour. Both pipelines will be marked to ensure harbour users are aware of their location. As the pipelines will enter the water on DND property, where harbour use is highly restricted, navigation and anchorage by users other than DND should not be impacted.

Latest update

September 13, 2022 – The public comment period on the project is closed. The Department of National Defence is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects.


Key documents

Key documents
Document Number Document Title File Date
1 Public Comment Period on Intent to Make a Determination - August 25, 2022


Peter Doggett
Department of National Defence
Peter Doggett, Project Manager
WL7 1st Floor
PO Box 99000 Stn Forces
Halifax, Nova Scotia B3K 5X5

  • Location

    • Canadian Forces Base Halifax (Nova Scotia)
  • Nature of Activity

    • Alternative Energy
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Department of National Defence
  • Authorities

    • Department of National Defence
  • Assessment Type

    Project on federal lands
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


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...within 200 kilometres
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