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Supplementary Standard SB-10 “Energy Efficiency Requirements” Amended on December 22, 2016.

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Key Changes:

In December 2016, the Ministry of Municipal Affairs (“Ministry”) published a new Supplementary Standard SB-10 (“SB-10)”) to help stakeholders meet the 2017 energy efficiency target set in the Building Code. The updated SB-10 supports changes to Division B Part 12 of the Building Code that come into force January 1, 2017.

Changes were made to Division 3 and Division 5 of SB-10 that will apply to construction for which a permit has been applied for after December 31, 2016.

In this updated Supplementary Standard, Division 3 and Division 5 have been substantially revised. The compliance path in the previous Division 3 (i.e. September 14, 2012 version) has been replaced by three compliance paths that are based on the following leading contemporary energy codes:

  1. ANSI/ASHRAE/IES Standard 90.1-2013, “Energy Standard for Buildings Except Low-Rise Residential Buildings”, and additional requirements introduced through Chapter 2;
  2. CCBFC NRCC 56191, “2015 National Energy Code of Canada for Buildings” and additional requirements introduced through Chapter 3; and
  3. ANSI/ASHRAE/USGBC/IES Standard 189.1-2014, “Standard for the Design of High-Performance Green Buildings except Low-Rise Residential Buildings”.

To support Ontario’s design and construction industry in complying with the changed requirements, construction for which a permit is applied for between January 1, 2017 and December 31, 2017 is permitted to comply with Division 3 and Division 5 of SB-10 as they read in the previous version of SB-10 (dated September 14, 2012).

The following further describes the three compliance paths:

1.      Compliance Path based on ASHRAE 90.1 (2013):

The requirements of ASHRAE 90.1 (2013) as modified by Chapter 2 of Division 3 must be met. Chapter 2 includes the following additional requirements and modifications that exceed ASHRAE 90.1 (2013):

  • building envelope enhancements for all major components
  • lighting power densities reduced by using more efficient lighting fixtures and LEDs
  • HVAC system fan power limitations reduced
  • energy recovery device effectiveness enhanced i.e. 50% to 55%
  • gas fired boilers and hot water tank efficiencies enhanced and harmonised with Energy Efficiency - Appliances and Products (O. Reg. 404/12 as amended)
  • electric motor efficiencies indexed to applicable Ontario energy efficiency regulations
  • energy use measurements and monitoring harmonized with other Ontario regulations

2.      Compliance Path based on NECB (2015):

The requirements of NECB 2015 as modified by Chapter 3 of Division 3 must be met. Chapter 3 includes the following additional requirements and modifications that exceed NECB 2015:

  • building envelope enhancements for windows, roofs and doors
  • lighting power densities, gas fired boiler, hot water tank and energy recovery device efficiencies harmonized with enhancements made within ASHRAE 90.1 compliance path (as above)
  • electric motor efficiencies indexed to applicable Ontario energy efficiency regulations
  • elimination of performance level differences between prescriptive and trade-offs methods (and performance methods) i.e. harmonisation of rules for use of Fenestration and Door Area to Gross Wall Area Ratio with ASHRAE 90.1
  • energy use measurements and monitoring harmonized with other Ontario regulations

3.      Compliance Path based on ASHRAE 189.1 (2014):

This compliance path is based on the prescriptive requirements of ASHRAE 189.1-2014 with the exception of the requirements for appliances and devices installed by occupants.

  • applicable prescriptive requirements of Section 7 of ASHRAE 189.1 (2014) are identified and listed

The updated SB-10 also includes harmonized carbon dioxide equivalent emission factors and summer and winter peak electric demand requirements depending on when the peak demand occurs.

There are no major changes made to Divisions 2 and 4, except that any performance compliance path that may be based on MNECB (1997) has been revoked at the end of the transition period mentioned above.

Please note changes to Division 3 and Division 5 respond to factors such as government’s plan to fight climate change. The new compliance paths therefore include more stringent requirements to conserve energy and reduce greenhouse gas emissions and peak electric demand loads exerted on the grid. Encouragement is also provided for the use of renewable technologies.


Ontario CodeNews 247 - Amendments to Supplementary Standard SB-10


The Minister’s Ruling and the revised Supplementary Standard SB-10 (as amended on December 22, 2016) are available here.