Recommissioning for existing buildings
Recommissioning (RCx) improves buildings to save energy and make buildings more comfortable for their occupants.
RCx can yield energy savings of 5 to 15 percent with a typical payback period of less than three years in most cases. Annual savings can sometimes reach 30 percent.
Recommissioning is one of the most economical ways to improve a building’s performance because it:
- Optimizes energy efficiency
- Optimizes building operations
- Improves peak building energy demand management
- Ensures the sustainable development and operation of buildings
- Improves business strategies
Use these tools and services
Natural Resources Canada (NRCan) offers a range of tools and services for engineers, managers, owners and stakeholders of institutional and commercial buildings who want to use RCx to improve their buildings’ performance.
Efficient Heating, Ventilation and Air conditioning (HVAC) Operation during a Pandemic: Self-evaluation Tool and Guide
NRCan has developed this voluntary, self-assessment Tool and Guide to provide feedback on the impact of your HVAC strategies during and after pandemics. It highlights key areas and best practices for efficient HVAC operation during these times. Learn more about it!
NRCan’s RCx guide
The more involved you are in the RCx process, the larger the benefits and the more lasting the impact. NRCan has developed a comprehensive guide on how to use RCx to affordably improve performance and save energy.
NRCan developed a 3.5-day advanced RCx course for engineers and technicians. This course covers all stages of the RCx process: planning, investigation, implementation, hand-over and monitoring.
Training topics include:
- The system approach
- Efficient methods for uncovering problems
- Working with building staff
- Calculating savings
- Implementing RCx findings
- Updating documentation and providing targeted training
- Applying best practices in ongoing commissioning
Join an advanced training course.
Read our case study series
Learn how RCx projects reduced costs and greenhouse gas emissions, and improved comfort for these buildings’ occupants.
- Adult education centre, Centre St-Michel, Sherbrooke, Quebec
- Elementary school, Our Lady of Peace, Laval, Quebec
- Office building, CRA Building, Victoria, BC
- Office tower, Royal Bank Office, Winnipeg, Manitoba
Tell us about your RCx project
NRCan is developing an RCx projects database. Download the entry form and add data from your own RCx project.
We will use your data to expand our database and possibly write a case study about your project. The data you collect should target RCx activities and related benefits in a manner that is isolated from activities not strictly related to RCx.
- Building Recommissioning for Commercial and Institutional Buildings Opportunities for Owners and Property Investors, Natural Resources Canada (2011)
- Commissioning Guide for New Buildings, Natural Resources Canada (2010)
- Recommissioning case studies, Natural Resources Canada
- Building Optimization, Natural Resources Canada
Other commissioning resources
- Z320-11 - Building Commissioning Standard & Check Sheets, Canadian Standards Association, 2011
- New Construction Building Commissioning Best Practice, Building Commissioning Association (2011)
- ASHRAE Guideline 0-2013: The Commissioning Process, American Society of Heating, Refrigerating and Air-Conditioning Engineers (2013)
- Functional Testing Guide & Control System Design Guide, Portland Energy Conservation, Inc.
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