Helping Massachusetts Municipalities Create a Greener Energy Future Code Informational Session February 10, 2016 Introduction to Energy Codes What & Why? ChangesFuture Agenda The wonderful world of Acronyms ASHRAE American Society of Heating, Refrigeration and Air-Conditioning Engineers ICCInternational Codes Council IECC International Energy Conservation Code IRC International Residential Code DOER Department of Energy Resources HERS Home Energy Rating DOEDepartment of Energy IECC and ASHRAE Codes ICC & ASHRAE develop model building codes and standards for the US. ICC: publishes IECC energy code 3 year cycle IECC 2012, IECC 2015, IECC 2018 ASHRAE: publishes 90.1 standard 3 year cycle , The World of Codes 1980s through s through 2006 Minimum codes were truly minimal Minimum codes were truly minimal DOE pushed for marginal improvements (1% to 3% per cycle) DOE pushed for marginal improvements (1% to 3% per cycle) DOE proposed (successfully) a major rewrite of the IECC in 2004 (became the 2006 IECC)emphasis was format, not stringency DOE proposed (successfully) a major rewrite of the IECC in 2004 (became the 2006 IECC)emphasis was format, not stringency 2009 to present 2009 to present The world has changed The world has changed ICC/DOE working from two goals ICC/DOE working from two goals 30% improvement in 2012 IECC (relative to 2006) 30% improvement in 2012 IECC (relative to 2006) 50% improvement in 2015 IECC (relative to 2006) 50% improvement in 2015 IECC (relative to 2006) What in the world has changed? What is driving the changes to the code: What is driving the changes to the code: Public interest Public interest Political will Political will Pull at ICC Pull at ICC What in the world has changed? What in the world has changed? More efficiency making it into codes More efficiency making it into codes More detail/complexity being pushed onto code officials More detail/complexity being pushed onto code officials More need for expertise and analysis tools in code process More need for expertise and analysis tools in code process Less distinction between code, beyond-code programs Less distinction between code, beyond-code programs Massachusetts Energy Code History 6 th edition of the building code had a MA specific energy code 6 th edition of the building code had a MA specific energy code 7 th edition adopted IECC th edition adopted IECC 2006 Commercial bldgs. ASHRAE Commercial bldgs. ASHRAE th edition adopted IECC 2009 on July 1, th edition adopted IECC 2009 on July 1, 2010 Roughly 10-15% more efficient than IECC 2006 Roughly 10-15% more efficient than IECC 2006 Commercial bldgs. ASHRAE remains Commercial bldgs. ASHRAE remains Also in 2010 the edition of the Stretch Code appendix Also in 2010 the edition of the Stretch Code appendix IECC 2012 was adopted on 7/1/2013 IECC 2012 was adopted on 7/1/2013 Designed to be 30% better than IECC 2009 Designed to be 30% better than IECC 2009 Stretch Code Stretch Code IECC 2015 coming July 1, 2016 or at least by summer IECC 2015 coming July 1, 2016 or at least by summer IECC 2015 Overview of the 2015 Energy Code As with IECC 2012, IECC 2015 requires a better envelope, insulation, ducts, windows, mechanical and more efficient lighting. 2015 IECC Overview THE BIG CAVEAT Approximately 15% more efficient than the 2009 IECC Approximately 15% more efficient than the 2009 IECC Contains minor changes, very similar to IECC 2012, except for: Contains minor changes, very similar to IECC 2012, except for: Introduction of a new Energy Rating Index (ERI) compliance path Introduction of a new Energy Rating Index (ERI) compliance path Updated Existing Building Section that includes Renovations, Additions and Historic Building language: Updated Existing Building Section that includes Renovations, Additions and Historic Building language: Listed in the National Register Listed in the National Register Eligible to be listed in the National Register Eligible to be listed in the National Register Designated as historic under an applicable state or local law Designated as historic under an applicable state or local law Structure of the IECC 2015 Ch. 1 and Ch. 2 Scope and Application / Administrative and Enforcement Ch. 1 and Ch. 2 Scope and Application / Administrative and Enforcement Ch. 3 Climate zones and general materials requirements Ch. 3 Climate zones and general materials requirements Ch. 4 Residential and Commercial Energy Efficiency Ch. 4 Residential and Commercial Energy Efficiency Ch. 5 Existing Buildings Ch. 5 Existing Buildings Ch. 6 Referenced Standards Ch. 6 Referenced Standards Minor Updates to Chapter 4 Building Envelope Provisions The first change is a new exception to section Access hatches and doors. The first change is a new exception to section Access hatches and doors. The exception allows vertical doors that provide access from conditioned to unconditioned spaces to meet the fenestration requirements (i.e., U-value) in Table R The exception allows vertical doors that provide access from conditioned to unconditioned spaces to meet the fenestration requirements (i.e., U-value) in Table R This change means that these types of doors, such as attic knee wall doors, do not have to be insulated the same way as the surrounding wall, as long as they meet the U-value requirements in the table. This change means that these types of doors, such as attic knee wall doors, do not have to be insulated the same way as the surrounding wall, as long as they meet the U-value requirements in the table. Update to Chapter 4 Another new exception allows for the floor framing cavity insulation to not be in contact with the underside of the subfloor decking as long as it is: Another new exception allows for the floor framing cavity insulation to not be in contact with the underside of the subfloor decking as long as it is: In contact with the top side of sheathing or continuous insulation installed on the bottom side of floor framing; In contact with the top side of sheathing or continuous insulation installed on the bottom side of floor framing; And the all the perimeter band joists are insulated to the wood frame wall requirements. And the all the perimeter band joists are insulated to the wood frame wall requirements. The next adds a new section to address Walls with partial structural sheathing The next adds a new section to address Walls with partial structural sheathing Where continuous insulation is required and structural sheathing covers 40 percent or less of the total exterior wall area, the R-value of the continuous insulation may be reduced by an amount not to exceed R-3 in order to maintain a consistent sheathing thickness. Where continuous insulation is required and structural sheathing covers 40 percent or less of the total exterior wall area, the R-value of the continuous insulation may be reduced by an amount not to exceed R-3 in order to maintain a consistent sheathing thickness. Additional Updates to Chapter 4 The change allows dynamic glazing to satisfy the Solar Heat Gain Co-Efficient (SHGC) requirements where the ratio of the higher- to-lower labeled SHGC is greater than or equal to 2.4, or where both the upper and lower labeled SHGC already comply with the requirements of the table. The change allows dynamic glazing to satisfy the Solar Heat Gain Co-Efficient (SHGC) requirements where the ratio of the higher- to-lower labeled SHGC is greater than or equal to 2.4, or where both the upper and lower labeled SHGC already comply with the requirements of the table. The most significant revision was made in chapter 4 was under Air Barrier and Insulation Installation The most significant revision was made in chapter 4 was under Air Barrier and Insulation Installation Splitting the criteria column into separate air barrier and insulation installation criteria. Splitting the criteria column into separate air barrier and insulation installation criteria. Additionally new criteria for concealed sprinklers was added along with revised criteria for walls, floors and fireplaces. Additionally new criteria for concealed sprinklers was added along with revised criteria for walls, floors and fireplaces. Ditto Updates to Chapter 4 Testing for building envelope air leakage as required under section 4 was also revised to require: Testing for building envelope air leakage as required under section 4 was also revised to require: That all testing be done in accordance with ASTM E 779 or ASTM E That all testing be done in accordance with ASTM E 779 or ASTM E There is also a change to the duct insulation provisions There is also a change to the duct insulation provisions The new language clarifies that both supply and return ducts in attics must be insulated to a minimum of R-8, where 3 inch or greater in diameter and R-6 where less than 3 inch diameter. The new language clarifies that both supply and return ducts in attics must be insulated to a minimum of R-8, where 3 inch or greater in diameter and R-6 where less than 3 inch diameter. Supply and return ducts located elsewhere in the building must be insulated to a minimum of R-6, where 3 inch or greater in diameter and R-4.2 where less than 3 inch diameter. Supply and return ducts located elsewhere in the building must be insulated to a minimum of R-6, where 3 inch or greater in diameter and R-4.2 where less than 3 inch diameter. And last, but not least Two new appendices were approved: Procedures for worst-case (CAZ) testing of atmospheric venting systems Procedures for worst-case (CAZ) testing of atmospheric venting systems Solar-ready provisions for detached one- and two-family dwellings. An appendix is not mandatory unless an adopting entity makes it such. Solar-ready provisions for detached one- and two-family dwellings. An appendix is not mandatory unless an adopting entity makes it such. After analyzing all the changes that were approved for the 2015 IECC, you will notice that the actual impact to energy efficiency is minor. After analyzing all the changes that were approved for the 2015 IECC, you will notice that the actual impact to energy efficiency is minor. The most significant changes to the new IECC residential provisions will be the addition of a new Energy Rating Index compliance path and a new chapter to address existing buildings. The most significant changes to the new IECC residential provisions will be the addition of a new Energy Rating Index compliance path and a new chapter to address existing buildings. Chapter 4 Residential Energy Code Residential Provisions contains the energy-efficiency- related requirements for the design and construction of residential building regulated under this code. Residential Provisions contains the energy-efficiency- related requirements for the design and construction of residential building regulated under this code. The applicable portions of a residential building must comply with the provisions within this chapter for energy efficiency. The applicable portions of a residential building must comply with the provisions within this chapter for energy efficiency. The provisions within the chapter promote energy efficiency in the building envelope, the heating and cooling system and the service water heating system of the building. The provisions within the chapter promote energy efficiency in the building envelope, the heating and cooling system and the service water heating system of the building. Chapter 4 Commercial Energy Code Commercial Provisions contains the energy-efficiency- related requirements for the design and construction of most types of commercial buildings and residential buildings greater than three stories in height above grade. Commercial Provisions contains the energy-efficiency- related requirements for the design and construction of most types of commercial buildings and residential buildings greater than three stories in height above grade. Residential buildings, townhouses and garden apartments three stories or less in height are covered in the IECC Residential Provisions. Residential buildings, townhouses and garden apartments three stories or less in height are covered in the IECC Residential Provisions. The provisions within the chapter promote energy efficiency in the building envelope, the heating and cooling system and the service water heating system of the building. The provisions within the chapter promote energy efficiency in the building envelope, the heating and cooling system and the service water heating system of the building. Scope of Chapter 4 Same definitions, Different code Defines Residential Buildings as: Defines Residential Buildings as: One- and two-family dwellings, townhouses of any size and R-2, R-3, R-4 3 stories One- and two-family dwellings, townhouses of any size and R-2, R-3, R-4 3 stories All buildings that are not residential by definition are commercial All buildings that are not residential by definition are commercial Includes additions, alterations, renovations and repairs Includes additions, alterations, renovations and repairs Existing buildings Existing buildings Buildings designated as historic Buildings designated as historic Very low energy use buildings [