The New Ontario Energy Code – Where Are We Headed? Presented by: Doug Cane Caneta Research Inc./Caneta Energy Presented to: CaGBC ‐ Greater Toronto Chapter February 28,2012
Caneta Research Inc.(Caneta Energy) • Caneta services : – engineering research and analysis, monitoring and management services. – independent peer review of LEED and HPNC energy model submissions. – OEE CBIP and Eco Energy Model Validation between 2004 and 2011. – energy consulting and code compliance modelling services to owners and design teams for new buildings. – Three staff are listed on the CaGBC Qualified Modeller List. – www.canetaenergy.com
Context for This Work • Doug Cane was project manager on the Ministry of Housing, Code Development Branch project that resulted in the new energy provisions for both the OBC 2006 and the now current amendment to OBC 2006. • This presentation was requested by your local chapter.
Introduction
Scope of Presentation • Considerations that came into play • Brief background – how new SB ‐ 10 of amended OBC 2006 was developed • Brief overview of requirements • Comparison with other energy codes • Comparisons with other jurisdictions –provinces and states • What is in store for the future
Acronyms/Nomenclature • ASHRAE 90.1 – Energy Standard for Buildings Except Low ‐ Rise Residential Buildings – first published in 1975 each succeeding edition in 1980,1989,2001,2004,2007 and 2010 more stringent. • ASHRAE 189.1 ‐ Standard for the Design of High ‐ Performance Green Buildings – first published in 2009. Energy efficiency just one aspect covered. Similar to LEED Framework. New edition in 2011. • MNECB – Model National Energy Code of Canada for Buildings 1997 • NECB – National Energy Code for Building 2011 • OBC – Ontario Building Code • SB ‐ 10 – Supplementary Standard SB ‐ 10 Energy Efficiency Supplement to OBC 2006 July 1, 2011 update – referred to here as OBC 2012 . ( http://www.mah.gov.on.ca/Page9528.aspx )
BRIEF BACKGROUND OF NEW SB ‐ 10
Factors and Considerations that Came into Play • OBC 2006 12.2.1.2 (2) Energy Efficiency Design After December 31,2011 “ 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 MNECB ” • Equivalent energy performance to LEED Canada NC 2009 Option 1 Path 1 Prerequisite.
New SB ‐ 10 • Applies to construction for which a permit applied after December 31,2011. • Three paths to compliance – Achieve energy efficiency levels attained by ANSI/ASHRAE 90.1 as modified by SB ‐ 10 Chapter 2 of Division 3. – Exceed by not less than 5% the energy efficiency levels attained by conforming to the ANSI/ASHRAE/IESNA 90.1. – Exceed by not less than 25% the energy efficiency levels obtained by conforming to the Model National Energy Code for Buildings.
How were they Developed • Identify energy criteria from ASHRAE 90.1 ‐ 2010, ASHRAE 189.1 ‐ 2009 and NECB Public review draft that are more stringent than requirements in OBC 2006 SB ‐ 10. • Apply selected energy criteria to a number of archetype buildings, create DOE 2.1E models and undertake energy simulations in Toronto and Sudbury. • Compare results to MNECB 1997 models of the same archetypes. • Archetype results were weighted by building starts and region to arrive at all ‐ Ontario energy saving with the objective of being ~ 25% better. • Impact Assessment.
Roof Requirements Code OBC 2006 OBC 2012 Overall R ‐ 20.4 Overall R ‐ 31.3 Example Construction: Example Construction: • 3 ‐ ply Built ‐ up Roofing • 3 ‐ ply Built ‐ up Roofing Roof • 0.5” Overlay Board • 0.5” Overlay Board • 3.5” polyisocyanurate • 5.0” polyisocyanurate • Vapour Barrier • Vapour Barrier • Concrete Roof Slab • Concrete Roof Slab
Exterior Wall Requirements Code OBC 2006 OBC 2012 Mass Wall R ‐ 11.6 Mass Wall R ‐ 16.7 Example Construction: Example Construction: • 3.5” Brick Veneer • 3.5” Brick Veneer • 1.0” Air Space • 1.0” Air Space • 1.0” Extruded Polystyrene • 2.0” Extruded Polystyrene Exterior Wall • Air Barrier • Air Barrier • 7.5” Concrete Block • 7.5” Concrete Block • 3.5” Metal Stud Framing • 3.5” Metal Stud Framing • 3.5” Batt Insulation • 3.5” Batt Insulation • Vapour Barrier • Vapour Barrier • 0.5” Gypsum Board • 0.5” Gypsum Board
Window Wall Requirements Code OBC 2006 OBC 2012 Overall U ‐ 0.52, SHGC ‐ 0.52 Overall U ‐ 0.35, SHGC ‐ 0.40 Window Wall Example Construction: Example Construction: • Double ‐ Glazed, Air ‐ Filled • Triple ‐ Glazed, Air ‐ Filled (30% WWR) • Low ‐ e (0.10) Coating • Low ‐ e (0.10) Coating on 2 Surfaces Overall U ‐ 0.39, SHGC ‐ 0.43 Overall U ‐ 0.35, SHGC ‐ 0.40 Window Wall Example Construction: Example Construction: • Double ‐ Glazed, Argon ‐ Filled • Triple ‐ Glazed, Air ‐ Filled (40% WWR) • Low ‐ e (0.05) Coating • Low ‐ e (0.10) Coating on 2 Surfaces Overall U ‐ 0.39, SHGC ‐ 0.33 Window Wall Not Permitted Under Example Construction: • Double ‐ Glazed, Argon ‐ Filled (50% WWR) Prescriptive Path • Low ‐ e (0.05) Coating Overall U ‐ 0.39, SHGC ‐ 0.21 Example Construction: Window Wall Not Permitted Under • Double ‐ Glazed, Argon ‐ Filled (60% WWR) Prescriptive Path • Tinted Glass • Low ‐ e (0.05) Coating
Mechanical and Electrical Requirements Code OBC 2006 OBC 2012 0.743 W/ft 2 0.600 W/ft 2 Installed Lighting Power Density Hydronic Circulation Pump Single Speed Variable Speed Boiler Thermal Efficiency 75% 80% Chiller COP 5.00 5.55
COMPARISON WITH OTHER CODES
High Rise Archetypes MURB Office
High Rise MURB • A 146,450 ft² (13,611 m²), 20 ‐ storey building with a wall ‐ to ‐ roof area ratio of 8.1. • The window ‐ to ‐ wall area ratio ‐ 50% in Toronto and 24.9% in Sudbury. • There are 6 apartments and 1 core zone per floor. • The zonal HVAC system is a two ‐ pipe fan coil system. A gas fired, DX cooled packaged system provides fresh air to the core zones. Fresh air to the suites enters via the door undercut from the hallway. • The fan coils supplied by a single natural gas boiler and a single water ‐ cooled chiller. • Walls are 75% window wall and 25% concrete block with brick veneer and interior insulation and drywall.
High Rise Office • A square 144,000 ft² (13,380 m²), 10 ‐ storey building with a wall ‐ to ‐ roof area ratio of 4.3. • The window ‐ to ‐ wall area ratio is 40% in Toronto and 24.9% in Sudbury. • The zoning includes 5 uniformly loaded zones per floor, with a 1,570ft² (146 m²) perimeter zone on each of the four major orientations and a core zone that accounts for 57% of the floor space. • The HVAC system includes six built ‐ up variable air volume (VAV) systems. A single natural gas boiler provides heating. A water ‐ cooled electric chiller and cooling tower provides cooling. Walls are 75% curtain wall and 25% concrete block with brick veneer and interior insulation and drywall.
Other Archetypes • Low Rise Office • Low Rise MURB • Retail strip mall with anchor store • Education • Warehouse
High Rise Office ‐ Comparison of Energy Codes
High Rise MURB ‐ Comparison of Energy Codes
COMPARISON WITH OTHER PROVINCES AND THE USA
Status of Provincial Energy Code Adoption
Status of U.S. Energy Code Adoption
High Rise Office ‐ Ontario and US State Codes
WHAT IS IN STORE FOR THE FUTURE
Other Provinces Playing Catch up Examples: • BC is in process of developing new energy requirements for Part 3 buildings. • Alberta has no requirement – not aware of plan for Part 3 Buildings. • Manitoba’s new Climate Change and Emissions Reduction Act 2009 called for building energy efficiency in Code by 2010.
Net Zero Buildings which, on an annual basis, use no more energy than is provided by on ‐ site renewable energy sources.
Net Zero European Union • Directive on the energy performance of buildings (EPBD) stipulates that by 2020 all new buildings constructed within the European Union after 2020 should reach nearly zero energy levels. ASHRAE/DOE • New Energy Bill Under Discussion –ASHRAE met with Senate staff and others to discuss a new energy bill with goal of achieving net zero energy commercial buildings by 2030.
European Country Targets Country Energy Target Denmark By 2020 all new buildings use 75 % less energy Finland 30 – 40 % less by 2010 Germany By 2020 buildings should be operating without fossil fuel Ireland Net zero energy buildings by 2013 Netherlands 50 % reduction by 2015 compared to current Code. Plans to build energy ‐ neutral by 2020 Sweden Total energy use / square metre in non ‐ residential buildings decrease to 20 per cent by 2020 and 50 per cent by 2050 United Kingdom 44 % better in 2013 and zero carbon as of 2016 Danish Building Institute, European Strategies to move towards very low energy buildings, 2008
High Rise Office ‐ Progress of Ontario Codes
High Rise MURB ‐ Progress of Ontario Codes
The Net Zero Challenge
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