Development and Introduction to the 2012 North Carolina Energy Conservation Code

Transcription

1 Development and Introduction to the 2012 North Carolina Energy Conservation Code

2 Overview of Today s Discussion Accepting the challenge to develop a stretch energy conservation code The process for preparing the code Approval and implementation of the code Training being provided Structure of the energy code New key elements of the code Enforcement process

3 Accepting the Challenge The NC State Energy Office teamed with the NC Governor s Office, NC DOI, NC Chapter of AIA, Appalachian State University, and Mathis Consulting to request a special project grant for energy code development. A special project grant of $500,000 was awarded by the US DOE to the NC State Energy Office.

4 The Importance of Federal Funding This work effort would not have been possible without the US Department of Energy grant to fund the research and analyses required to support the project. The work included computer modeling and simulation runs for several types of residential homes and commercial buildings, data analysis, and documents preparation. Many meetings were necessary.

5 Support of the NC Governor s Office Fundamental and most important to this effort was the commitment from the NC Governor s Office to provide assurances to the US DOE that the conditions for awarding the grant would be met. This commitment provided the inertia to keep the project on track when fundamental objections were voiced.

6 Obtaining Support of Key Constituent Organizations Prior to beginning the work effort, the NC Governor s Office conducted meetings with key stakeholders to obtain their support for the goals of the project. This included: NC Building Code Council NC Department of Insurance NC Chapter of AIA NC Engineering Board NC Home Builders Association

7 Key Commitments for Award of the US DOE Special Project Grant Develop and adopt a NC Energy Conservation Code 30% more energy efficient than the 2006 International Energy Conservation Code (IECC). (Model code for the 2009 NC Energy Conservation Code) Develop a mechanism to determine the level of code enforcement and identify the main problem areas for code enforcement officials, building designers, and contractors.

8 Key Commitments for Award of the US DOE Special Project Grant Provide training and technical assistance to improve compliance and enforcement of the energy code. Develop a system of continuous improvement for code enforcement. Serve as a model for other states in the Southeast and Mid-Atlantic Regions.

9 The Project Team The technical consultants comprising the key members of the project team were staff of Mathis Consulting and Appalachian State University. The NC State Energy Office and NC DOI provided guidance to facilitate the process. It was crucial to have knowledgeable team members active in national energy codes development to bring emerging ideas and proposals to the table.

10 Developing the Proposals The model code for development of the 2012 NC Energy Conservation Code (NCECC) is the 2009 IECC. The technical consultants of the project team developed additional proposals. Major sources for additional input to our 2012 NCECC were proposals being moved forward for incorporation into the 2012 IECC and ASHRAE Standard The project team also introduced new proposals for consideration to reach the 30% goal.

11 Approval of the 2012 NC Energy Conservation Code The approval process was long and challenging, but approval was reached with some compromise to the original goals. The original 30% improvement was retained for the mandatory commercial provisions. The residential provisions were reduced to approximately 15% for the mandatory provisions. A voluntary appendix for additional residential provisions was added to provide recommendations for reaching the 30% improvement.

12 Implementation Schedule The effective date for the 2012 NC Energy Conservation Code (NCECC) is January 1, The mandatory date for the 2012 NCECC is March 1, There is an overlap period with the current 2009 NCECC. Permits may still be obtained under the 2009 NCECC until March 1, 2012.

13 2012 NC Energy Conservation Code Books The 2012 NCECC books are available now. The 2012 NCECC may be purchased by walk-in customers at the NC DOI offices at 322 Chapanoke Road in Raleigh. The cost of the 2012 NCECC book is $30 in our office.

14 2012 NC Energy Conservation Code Books ICC also sells the 2012 NCECC books from their website: The 2012 NCECC is available for free viewing on the ICC website at the following URL: urces/2012northcarolina/12northcarolina_main.ht ml

15 NC Energy Conservation Code Training Much training is now being conducted for code officials using American Recovery and Reinvestment Act (ARRA) grant monies as a source for the funding. Several of these classes are also being opened for attendance to the design community, contractors, and home builders. These classes are free to attend.

16 NC Energy Conservation Code Training The training is being conducted by the Building and Fire Code Academy (BFCA) at many locations across North Carolina. The classes that include design professionals, contractors, and home builders are scheduled during February and March, Registration for these classes are by use of the BFCA web site at the following URL: cpath=145

17 NC Energy Conservation Code Training (cont.) The schedule and locations for classes for design professionals, contractors, and home builders are: February 7 & 8 Greensboro February 9 & 10 Charlotte February 28 & 29 Jacksonville March 8 & 9 Raleigh March 22 & 23 Asheville March 27 & 28 Fayetteville

18 NC Energy Conservation Code Training (cont.) The first day of each two day class is a class for the residential energy conservation code provisions. The second day of each two day class is a class for the commercial energy conservation code provisions. Each day is a six hour class. You may register for either day or both days. The classes are free.

19 NC Energy Conservation Code Training We are also developing an internet based educational reference program and will host content from the NC DOI OSFM web site. Videos of the residential and commercial training classes. Videos illustrating code requirements including blower door testing, air sealing, and duct blasting. The content may be viewed by anyone and it will be free of charge.

20 Energy Code Compliance Program Development We are developing a program for verifying 90% compliance with the 2012 NC Energy Conservation Code (NCECC). Commitments are to implement the program and demonstrate 90% compliance with the 2012 NCECC by 2017.

21 NC Specific REScheck and COMcheck Compliance Programs The US DOE/PNNL developed NC specific REScheck and COMcheck compliance software for demonstrating compliance with the 2012 NCECC. The software is free of charge and may be downloaded at the US DOE website at the following URL: REScheck is for residential buildings and COMcheck is for commercial buildings.

22 Structure of the 2012 NC Energy Conservation Code Chapter 1 Administration Chapter 2 Definitions Chapter 3 Climate Zones Chapter 4 Residential Energy Efficiency Chapter 5 Commercial Energy Efficiency Chapter 6 Referenced Standards Appendices

23 Chapter 1 Administration This chapter contains provisions for application, enforcement, and administration of code requirements. Sections included in Chapter 1 are: Scope and general requirements Alternate materials and methods Construction documents Inspections Reference standards

24 Chapter 2 Definitions This chapter defines terms with specific meaning in the energy code. For example, Residential Building and Commercial Building are uniquely defined in the energy code. RESIDENTIAL BUILDING. For this code, includes R-3 buildings, as well as R-2 and R-4 buildings three stories or less in height above grade. COMMERCIAL BUILDING. For this code, all buildings that are not included in the definition of Residential buildings.

25 Chapter 3 Climate Zones This chapter defines the climate zones that will serve to establish the exterior design conditions. This chapter also provides interior design conditions that are used as a basis for assumptions in heating and cooling load calculations. This chapter also provides basic material requirements for insulation materials and fenestration materials.

26 NC Climate Zones NC contains three climate Zones: 3, 4, & 5

27 NC Climate Zones 3, 4, & 5 NC Climate Zones are derived from the National Climate Zone map.

28 Chapter 4 Residential Energy Efficiency This chapter contains the energy efficiency related requirements for design and construction of residential buildings. This chapter addresses: Building thermal envelope Heating and cooling systems Service water heating systems Electric power and lighting systems

29 Chapter 4 Compliance Options Compliance with Chapter 4 can be performed in either of two ways: Comply with the mandatory and prescriptive requirements of this chapter (NC specific REScheck may be used), or Comply with Section 405 Simulated Performance Alternative

30 Key Residential Energy Code Upgrades Chapter 4 CLIMATE ZONE Increased the thermal envelope requirements. TABLE INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT FENESTRATI ON U-FACTOR SKYLIGHT U-FACTOR GLAZED FENESTRATIO N SHGC CEILING R-VALUE WOOD FRAME WALL R-VALUE MASS WALL R-VALUE FLOOR R-VALUE BASEMENT WALL R-VALUE SLAB R-VALUE & DEPTH CRAWL SPACE WALL R-VALUE / /13 0 5/ or 30 cont. 15, / / / NR 38 or 30 cont. 19, 13+5, or / / /13

31 Key Residential Energy Code Upgrades Chapter 4 CLIMATE ZONE Voluntary Appendix 4 values TABLE 4A INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT FENESTRATI ON U-FACTOR SKYLIGHT U-FACTOR GLAZED FENESTRATIO N SHGC CEILING R-VALUE WOOD FRAME WALL R-VALUE MASS WALL R-VALUE FLOOR R-VALUE BASEMENT WALL R-VALUE SLAB R-VALUE & DEPTH CRAWL SPACE WALL R-VALUE , 13+5, or / / / or 30 cont. 19, 13+5, or / / / NR 38 or 30 cont. 19, 13+5, or / / /19

32 Key Residential Energy Code Upgrades Added detailed thermal envelope air sealing requirements or blower door testing of the thermal envelope. The acceptance criteria for testing is 5 air changes per hour when tested with a blower door assembly at 50 pascals (33 lb/ft2) test pressure. The voluntary stretch acceptance criteria is 4 air changes per hour at 50 pascals test pressure.

33 Key Residential Energy Code Upgrades Add air sealing option TABLE AIR BARRIER INSPECTION COMPONENT Ceiling/attic CRITERIA Sealants or gaskets provide a continuous air barrier system joining the top plate of framed walls with either the ceiling drywall or the top edge of wall drywall to prevent air leakage. Top plate penetrations are sealed. For ceiling finishes that are not air barrier systems such as tongue-and-groove planks, air barrier systems,(for example, taped house wrap), shall be used above the finish Note: It is acceptable that sealants or gaskets applied as part of the application of the drywall will not be observable by the code official Walls Windows and doors Floors (including above-garage and cantilevered floors) Penetrations Garage separation Duct boots Recessed lighting Sill plate is gasketed or sealed to subfloor or slab. Space between window and exterior door jambs and framing is sealed. Air barrier system is installed at any exposed edge of insulation. Utility penetrations through the building thermal envelope, including those for plumbing, electrical wiring, ductwork, security and fire alarm wiring, and control wiring, shall be sealed. Air sealing is provided between the garage and conditioned spaces. An air barrier system shall be installed between the ceiling system above the garage and the ceiling system of interior spaces. Sealing HVAC register boots and return boxes to subfloor or drywall. Recessed light fixtures are air tight, IC rated, and sealed to drywall. Exception fixtures not penetrating the building envelope.

34 Key Residential Energy Code Upgrades Example air sealing figures from appendix APPENDIX Framed cavity walls. Insulation enclosure - 1. Tubs SECTION VIEW OF BATH TUB ON EXTERIOR WALL

35 Key Residential Energy Code Upgrades Framed cavity walls. Insulation enclosure 5. Walls that adjoin attic spaces SECTION VIEW OF WALL ADJOINING ATTIC SPACE

36 Key Residential Energy Code Upgrades APPENDIX 1.2 INSULATION AND AIR SEALING DETAILS APPENDIX Ceilings with attic spaces: Exception for fully enclosed attic floor systems SECTION VIEW OF CEILING WITH ATTIC SPACE

37 Key Residential Energy Code Upgrades HVAC duct system leakage testing is required for new systems. Total duct leakage must be less than or equal to 6 CFM/100FT2 of conditioned floor area served by the system tested at 0.1 inches w.g. across the entire system. The voluntary stretch acceptance criteria is 4 CFM/100FT2 at test conditions as noted above.

38 Key Residential Energy Code Upgrades Advanced lighting requirements. A minimum of 75% of the lamps in permanently installed lighting fixtures shall be high-efficacy lamps. HIGH-EFFICACY LAMPS. Compact fluorescent lamps, T-8 or smaller diameter linear fluorescent lamps, or lamps with a minimum efficacy of: 60 lumens per watt for lamps over 40 watts, 50 lumens per watt for lamps over 15 watts to 40 watts, and 40 lumens per watt for lamps 15 watts or less.

39 Residential Compliance Certificate ENERGY EFFICIENCY CERTIFICATE APPENDIX 1: RESIDENTIAL REQUIREMENTS APPENDIX 1.1 Energy Efficiency Certificate (Section 401.9) Builder, Permit Holder or Registered Design Professional Print Name: Signature: Property Address: Date: Insulation Rating - List the value covering largest area to all that apply Ceiling/roof: Wall: R- R- R-Value Floor: R- Closed Crawl Space Wall: R- Closed Crawl Space Floor: R- Slab: R- Basement Wall: R- Fenestration: U-Factor Solar Heat Gain Coefficient(SHGC) Building Air Leakage o Visually inspected according to OR o Building Air Leakage Test Results (Sec ) ACH50 [Target: 5.0] or CFM50/SFSA [Target: 0.30] Name of Tester / Company: Date: Phone: Ducts: Insulation R- Total Duct Leakage Test Result (Sect ) (CFM25 Total/100SF) [Target: 6] Name of Tester or Company: Date: Phone: Certificate to be displayed permanently

40 Chapter 5 Commercial Energy Efficiency This chapter contains the energy efficiency related requirements for the design and construction of commercial buildings which includes residential structures greater than three stories in height above grade. This chapter addresses: The building thermal envelope Heating and cooling systems Service water heating systems Electric power and lighting

41 Chapter 5 Compliance Options Compliance with Chapter 5 can be performed in three ways: Comply with the mandatory and prescriptive requirements of this chapter (NC specific COMcheck may be used), or Comply with Section 506 Total Building Performance, or Comply with ASHRAE Standard and exceed the minimum level of energy efficiency it prescribes by 20% following the procedure in Appendix G of the standard.

42 Key Commercial Energy Code Upgrades Thermal envelope requirements are based on the proposed ASHRAE values. Added specific air sealing details for commercial buildings in the appendices.

43 Key Commercial Energy Code Upgrades Climate Zone All Other Group R All Other Group R All Other Group R Roofs Insulation entirely above deck R - 25 ci R-25 ci R - 30 ci R-30 ci R - 30 ci R-30 ci Metal buildings (with R-5 thermal blocks) Attic and other - wood framing Attic and other - steel framing TABLE 502.2(1) BUILDING ENVELOPE REQUIREMENTS OPAQUE ASSEMBLIES R-10 + R-19 FC R-10 + R-19 FC R-19 + R-11 Ls R-19 + R-11 Ls R-19 + R-11 Ls R-19 + R-11 Ls R-38 R-38 R-42 R-42 R-42 R-42 R-38 R-38 R-49 R-49 R-49 R-49 Walls, Above Grade Mass R-7.6 ci R-9.5 ci R-9.5 ci R-11.4 ci R-11.4 ci R-15 ci Metal building R-0+R-13 ci R-0 + R-19 ci R-0 + R-15.8 R-0 + R-19 ci R-0 + R-19 ci R-0 + R-19 ci ci Metal framed R ci R R-7.5 ci R-13 + R-10 ci R-13 + R-12.5 ci R-13 + R-12.5 ci R R-15 ci Wood framed and other R-13 + R-3.8 ci R-19, R-13+ R-5, or R-15 + R-3 R-13 + R-7.5 ci R-19, R-13+ R-5, or R-15 + R-3 R-13 + R-10 ci R-19, R-13+ R-5, or R-15 + R-3 Walls, Below Grade Below-grade wall R-7.5 ci R-7.5 ci R-7.5 ci R-10 ci R-7.5 ci R-10 ci Floors Mass R-12.5 ci R-12.5 ci R-14.6 ci R-16.7 ci R-14.6 ci R-16.7 ci Joist / Framing R-30 e R-30 e R-38 R-38 R-38 R-38 Slab-on-Grade Floors Unheated slabs NR R-10 for 24 in. R-15 for 24 in. R-15 for 24 in. R-15 for 24 in. R-20 for 24 in. Heated slabs R-15 for 24 in. R-15 for 24 in. R-20 for 24 in. R-20 for 48 in. R-20 for 48 in. R-20 for 48 in. Opaque Doors Swinging U 0.70 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 Roll-up or sliding U U U U U U

44 Key Commercial Energy Code Upgrades TABLE BUILDING ENVELOPE REQUIREMENTS: FENESTRATION CLIMATE ZONE Vertical Fenestration (30% maximum of above-grade wall) U-Factor Framing materials other than metal with or without metal reinforcement or cladding U-Factor Metal framing with or without thermal break Curtain Wall/Storefront U-Factor Entrance Door U-Factor All Other U-Factora SHGC-All Frame Types SHGC: PF < SHGC: 0.25 PF < NR SHGC: PF NR Skylights (3% maximum, 5% if using automatic daylighting controls) U-Factor SHGC

45 Key Commercial Energy Code Upgrades APPENDIX 2: COMMERCIAL BUILDING REQUIREMENTS APPENDIX 2.1: Air Sealing Details Sealing of the building envelope 1. Air seal around fenestration frames PLAN VIEW OF WINDOW IN WOOD FRAME WALL

46 Key Commercial Energy Code Upgrades Sealing of the building envelope 1. Air seal around fenestration frames SECTION VIEW OF CURTAIN WALL

47 Key Commercial Energy Code Upgrades Sealing of the building envelope 2. Air seal junctions between walls and foundations SECTION VIEW OF WOOD FRAME WALL, FLOOR, AND FOUNDATION

48 Key Commercial Energy Code Upgrades Demand control ventilation is required for certain buildings and building spaces. Ventilation systems in buildings greater than 10,000 ft2 of conditioned floor area shall have demand controls. Building spaces with maximum occupant load exceeding 40 or more people per 1000 ft2 shall have demand controls.

49 Key Commercial Energy Code Upgrades Included more detailed HVAC system completion and verification requirements. Added one additional requirement at designer s choice: More efficient mechanical equipment, reduced lighting power density, energy recovery ventilation, more efficient service water heating, automatic day lighting control system, or on-site supply of renewable energy.

50 NC State Building Code Enforcement The NC Department of Insurance provides general oversight of code enforcement for the State of NC. There are 490 jurisdictions in NC. There are 1,336 Building, 1,078 Electrical, 1,127 Mechanical, and 1,123 Plumbing code officials with some duplication in numbers as many hold certification in more than one field.

51 NC State Building Code Enforcement (cont.) Enforcement is generally through the local jurisdictions by way of the permitting process. Local code officials perform plan review and field inspections to assure code compliance. Plan review and inspection of state owned buildings is by the Office of State Construction.

52 In Development Now Expansion of the NC Code Officials Qualification Board qualification program for inspectors to include energy code training and testing in the core program. The NC Building Code Council is monitoring the development of the ICC International Green Construction Code in consideration of developing a future NC Green Code.

53 Summary NC has embarked on a mission to significantly improve the 2012 NC Energy Code. The goals of this project are well beyond our normal code adoption process. Much time, effort, and resources have been required to facilitate the work. This work could not have been accomplished without the dedication of the project team, the ad hoc committee, the NC BCC, the NC Governor s Office, the US DOE, and the NC Chapter of the USGBC. All have made a significant contribution.

54 Questions Are there any questions? Thank you. You can contact me: Phone: x-239