The Ins & Outs of Energy Efficiency in the Building Code
The Ins & Outs of EnergyEfficiency in the Building Code Bob Bach, P.Eng. Senior Partner Energy Profiles Limited
Overview Role of the Building Code Conservation Advisory Council Where the Building Code is in 2012 Where the Building Code may be in 2017 Impact on Overall Energy Utilization Intensity
Building Code Conservation Advisory Council Formed in 2010 with representatives from AMO, BILD, BOMA, CEEA, EGD, LMCBO, NAIMA, OAA, OHBA, SBC, UGL. Role is to provide strategic advice to the Minister on energy and water conservation, barriers to green technologies, promote on- site generation of renewable energy, and how to enhance industry capability to implement conservation.
OBC 2006, Part 1126.96.36.199. Energy Efficiency Design After December 31, 2011 (2) Except as provided in Sentences (3) and (5), the energy efficiency of all buildings shall be designed to exceed by not less than 25% the energy efficiency levels attained by conforming to the Model National Energy Code for Buildings.188.8.131.52. Energy Efficiency Design After December 31, 2011 (2) Except as provided in Sentences (3) and (5), the energy efficiency of all buildings shall conform to Supplementary Standard SB-10. (revised July 1, 2011)
Overview of SB-10, Effective 1/1/2012 All Administrative/Climate ZonesComponent/System NECB 2011 (when MNECB Plus 25% ASHRAE 90.1-2010 Plus 5% ASHRAE 90.1-2010 Hybrid published) Supplementary Std SB-10Building Envelope MNECB 1997 Part 3 ASHRAE 90.1-2010 Sect 5 (ASHRAE 189.1-2009) NECB 2011 Part 3Lighting MNECB 1997 Part 4 ASHRAE 90.1-2010 Sect 9 ASHRAE 90.1-2010 Sect 9 NECB 2011 Part 4Heating, Ventilating &Air Conditioning MNECB 1997 Part 5 ASHRAE 90.1-2010 Sect 6 ASHRAE 90.1-2010 Sect 6 NECB 2011 Part 5Service Water Heating MNECB 1997 Part 6 ASHRAE 90.1-2010 Sect 7 ASHRAE 90.1-2010 Sect 7 NECB 2011 Part 6Electrical Power MNECB 1997 Part 7 ASHRAE 90.1-2010 Sect 8 ASHRAE 90.1-2010 Sect 8 NECB 2011 Part 7Performance Path MNECB 1997 Part 8 ASHRAE 90.1-2010 Sect 11 ASHRAE 90.1-2010 Sect 11 NECB 2011 Part 8
Compliance Issues Compliance forms have been prepared by the ministry. (http://www.mah.gov.on.ca/Page9891.aspx). Prescriptive path compliance/tradeoff software is now available for the ASHRAE 90.1-2010/SB-10 Div.3, using DOE COMcheck program. (http://www.energycodes.gov/comcheck). Performance Path Compliance software (Can-Quest) will soon available for NECB – it is now being field tested.
Next Edition of the Building Code (2017?) Current expectation: incremental gain in efficiency to be 12 to 13% - BCCAC has not yet prepared recommendations. Possible adoption of ASHRAE 90.1-2013 or 2016, could still require a hybrid. Discussions to update the NECB are underway, possibly as soon as 2013.
Reduction in Energy Utilization Intensity for Weighted Average of all Buildings: OBC & TGS Floorspace & Occupancy Typical WeightedCode, Standard, or Program Type Weighted Average Average EUI, Percent Better 2 Performance Increment ekWh/ft /yr Than BaselineMNECB 0% 25.0 Ontario Building CodeOBC 2006 (above MNECB) 17% 20.8OBC 2012 (above MNECB) 25% 18.8 Current Toronto Green StandardTGS Tier 1 (above MNECB) 25% 18.8 (Baseline)TGS Tier 2 (above MNECB) 35% 16.3 (Baseline) Proposed Toronto Green Standard (2012)TGS Tier 1 Phase I (aboveOBC 2012) 5% 17.8 5%TGS Tier 1 Phase 2 (aboveOBC 2012) 15% 15.9 15%TGS Tier 2 Phase 1(aboveOBC 2012) 15% 15.9 2%TGS Tier 2 Phase 2 (aboveOBC 2012) 25% 14.1 13%