Copyright 2010 International Code Council

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1 2009 IECC Fundamentals Residential Provisions for Designers Based on the 2009 International Energy Conservation Code Your Instructor today is: 2009 IECC Performing Residential Inspection Highlights 2 William H. (Bill) Hudson, CBO, MCP 3 Provisions for Designers 1

2 William H. (Bill) Hudson, CBO, MCP Standards Technical Panel for Energy Management Equipment, STP 916 Fire Tests of Insulated Wall Construction and Interior Finish Material STP Accreditation The International Code has been accredited as an Authorized Provider by the International Association for Continuing Education and Training (IACET). As a result of their Authorized Provider accreditation status, ICC is authorized to offer IACET CEUs for its programs that qualify under the ANSI/IACET Standard. You will obtain full CEUs for this course, if you actively participate in the training activities and stay for the entire session. Evidence of this will be the sign out sheet. 6 Provisions for Designers 2

3 Pre-Test This short pre-test is designed to measure content areas covered in this class and will indicate what you already know about these areas. At the end of this class, you will be asked to take the test again in order to measure your learning IECC Fundamentals Commercial and Residential Provisions for Designers 7 1. The IECC definition of a Residential Building is: a. Identical to the Group R occupancy as defined by Chapter 3 of the International Building Code. b. Limited to structures governed by the International Residential Code. c. For this code, includes R-3 buildings, as well as R-2 and R-4 buildings three stories or less in height above grade. d. For this code, all structures not included in the definition of Commercial buildings Match the paraphrased definitions with the code/standard a. b. c. ABOVE-GRADE WALL. A wall more than 50 percent above grade and enclosing conditioned space. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts. Above-grade walls are those walls covered on the exterior of the building and completely above grade or walls that are more than 15 percent above grade. That portion of a wall that is not entirely below finish grade and in contact with the ground. i. ii. iii. CODE/STANDARD ANSI/ASHRAE/IES STANDARD IECC- RESIDENTIAL PROVISIONS 2009 IECC- COMMERCIAL PROVISIONS 9 Provisions for Designers 3

4 3. The 2009 IECC regulates the following building systems: a. Building thermal envelope, Indoor air quality, Building site location, Water utilization. b. Building orientation, HVAC, Electrical, Service water heating. c. Building thermal envelope, HVAC, Process electrical loads, Service water heating. d. Building thermal envelope, HVAC, Electrical, Service water heating A design professional may choose to demonstrate building thermal envelope compliance under the 2009 IECC, while the MEP compliance conforms to ANSI/ASHRAE/IES STANDARD a. Always b. Sometimes c. Never Please identify the type of compliance that each of these paths demonstrate: Compliance Path Prescriptive Performance Simulated Performance Alternative R-value Computation UA Alternative Total UA Total Building Performance RESCheck 12 Provisions for Designers 4

5 6. A building built and operated in compliance with the 2009 IECC will have approximately % energy cost savings over the same building built and operated in compliance with the 2006 IECC. 13 Module 1 Introduction Seminar Goal The goal of this seminar is for participants to apply the 2009 IECC to increase the efficient use of energy in the design and construction of new buildings and alterations to existing buildings. Workbook Page 1 15 Provisions for Designers 5

6 Seminar Objectives Upon completion of this seminar, participants will be better able to: Locate general topics in the 2009 IECC. Locate applicable tables in the 2009 IECC. Apply code requirements to real-world situations. Explain the intent behind a code requirement. Workbook Page 1 16 Seminar Objectives (cont.) Upon completion of this seminar, participants will be better able to: Identify borderline scenarios as compliant or noncompliant Identify essential code compliant for designing energyefficient building thermal envelopes, energy-efficient mechanical design principles and electrical power and lightning systems. Workbook Page 1 17 General Framework Contains energy provisions Allows use of materials, products and methods of construction that can increase the level of energy efficiency for a new building Workbook Page 4 18 Provisions for Designers 6

7 General Organization IECC Chapter 1, Administration and Enforcement groundwork for enforcement of the IECC covers the types of construction projects that must comply, projects that are exempt and how to handle additions, alterations, renovations and repairs. adds four additional categories of alterations. It requires that the mandatory provisions be met for Chapters 4 and 5 for buildings constructed using above code programs. several additional items were added to those required on the construction documents. Workbook Page 4 19 General Organization IECC Chapter 2, Definitions This chapter provides definitions of code-specific terms listed alphabetically. For 2009 new definitions and revisions were added for clarity of the document and its intent. Workbook Page 5 20 General Organization IECC Chapter 3, General Requirements This chapter contains climate zones used to set the requirements for envelope and mechanical provisions of the code. addresses provisions applicable to the identification, installation and use of energy-efficient efficient materials, systems and equipment. provides the first of its kind reference to specific standards and rating conditions for the testing and listing of insulation R-values specific to the type of insulation and its intended use. addresses the interior design conditions for calculating heating and cooling loads. Workbook Page 5 21 Provisions for Designers 7

8 General Organization IECC Chapter 4, Residential Energy Efficiency addresses energy conservation in residential buildings that are unique to this code, one- and two-family dwellings, townhouses and multiple-family housing three stories or less in height. several changes within this chapter including the tables of this chapter. these changes should lead to aggressive improvements in energy savings. these savings are addressed as strict requirements for air sealing of the envelope and the building systems. Workbook Page 5 22 General Organization IECC Chapter 5, Commercial Energy Efficiency includes simplified, usable provisions for energy conservation in commercial structures for all buildings not covered by Chapter 4, or exempt from the code. IECC Chapter 6, Referenced Standards numerous industry standards are referenced. identifies those standards and provides contact information for further investigation. compliance with the referenced standards is necessary for compliance with this code. Workbook Page IECC Performing Residential Energy Plan Reviews 23 Objectives of the Code The following are regulated: Building Envelope Mechanical Systems Electrical Systems Service Water Heating Systems Workbook Page 6 24 Provisions for Designers 8

9 Code Compliance Process 1. Determine if the project must comply with the IECC 2. Determine if the project is residential or commercial 3. Compliance documentation 4. Plan reviewer is to ensure the documentation is clearly identified. 5. Confirm that energy-using features of the building are installed per the approved plans and documentation Workbook Page Designers Tip: It is then left to the discretion of the designer to pursue a prescriptive- or performance-based path for the building envelope and remaining energy-using systems. Workbook Page Provisions for Designers 9

10 Commercial Building Workbook Page 7 28 IECC Residential Compliance Process Must the project comply with the IECC? Prescriptive Path Building Thermal Envelope and Electrical Mandatory Provisions Air Leakage and Building Systems Performance Path Simulated Performance Alternative R-value Computation UA Alternative Total UA Alternative Document Compliance with IECC Plan Review Workbook Page 8 Field Inspection 29 Designers Tip: The designer should use this diagram as a template for energy efficient design. The submitted plans will be reviewed using this same model. Workbook Page 8 30 Provisions for Designers 10

11 Conclusion 1. Name 2 out of the 4 ways the 2009 IECC regulates effective and efficient use of energy. Building envelope, Mechanical, Electrical, Service water heating Workbook Page 9 31 Conclusion 2. Name the five steps in the IECC compliance process. 1. Determine if the project must comply with the IECC. 2. Determine if the project is residential or commercial. 3. Compliance documentation must be submitted to jurisdiction. 4. Documentation must clearly identified and energy feature meets or exceeds code. 5. Energy using feature installed per plans and documentation. Workbook Page 9 32 Conclusion 3. Compliance with the IECC is specifically limited to energy usage for human comfort. True False False, although the code does not specifically address energy use in process-type applications, there is not exemption. Workbook Page 9 33 Provisions for Designers 11

12 Module IECC Chapter 1 Administration and Enforcement 101 Scope and General Requirements Scope The provisions apply to several different project types: Newly conditioned space New construction in existing buildings Additions, alterations and repairs to existing buildings Mixed use buildings Change in occupancy Workbook Page Scope and General Requirements Newly Conditioned Space New Buildings Workbook Page 12 New Construction - Residential 36 Provisions for Designers 12

13 101 Scope and General Requirements Newly Conditioned Space Previously Unconditioned USED TO BE A GARAGE Workbook Page Scope and General Requirements Intent Life safety, health and environmental requirements take precedence over energy provisions. Workbook Page Scope and General Requirements Applicability Historic buildings Historic Building, Possibly Exempt Workbook Page Provisions for Designers 13

14 Designers Tip: Only the new or altered portions of affected systems must comply with the code. Workbook Page Scope and General Requirements Additions, alterations, renovations or repairs Where change increases energy use Applies to alteration as if it were new construction Exceptions Workbook Page Designers Tip: Additions are described as newly constructed, conditioned spaces or previously unconditioned spaces after heating or cooling equipment has been installed. All additions must comply with the IECC requirements of this code. Workbook Page Provisions for Designers 14

15 Designers Tip: Compliance options for additions include: Treat the addition as if it were a stand-alone building. Bring the entire building into compliance. Examples of when the entire building should be brought into compliance (i.e., when the existing service is altered to accommodate the addition). A repair is defined as the reconstruction or renewal of any part of an existing building for the purpose of its maintenance. Workbook Page Designers Tip: Envelope, lighting, service water heating, mechanical systems and related components are treated the same as they are for new buildings. Unaltered systems and portions of systems do not have to comply with all the requirements of the IECC. Workbook Page Scope and General Requirements Change in Occupancy An alteration that increases demand for fossil fuel or electrical energy onsite as a result of a change must comply with the code. Workbook Page Provisions for Designers 15

16 101 Scope and General Requirements Change in space conditioning Any conditioned space that is altered to become conditioned space, must meet the requirements of the code. Workbook Page Scope and General Requirements Page 5-7 Definitions for commercial and residential buildings: 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. Workbook Page Scope and General Requirements Mixed-Use building Each occupancy shall be separately considered as residential or commercial Condominiums Condominiums Apartments Building is now 4 stories. Commercial Provisions throughout Residential Residential Retail Retail Apartments Commercial / Residential Provisions for Designers 16

17 101 Scope and General Requirements Mixed Occupancy Mixed-use building Workbook Page 15 Mixed Hotel/Motel and Commercial Scope and General Requirements Compliance. Residential buildings shall meet the provisions of Chapter 4. Commercial buildings shall meet the provisions of Chapter Scope and General Requirements Get the low hanging fruit. Residential occupancies can get the best result from improvement in the building envelope. Commercial occupancies get the best result from improvement in the building systems. Workbook Page 19 Provisions for Designers 17

18 101 Scope and General Requirements Low Energy Buildings Buildings designated as exempt include buildings that use less than 1 watt/ft 2 or 3.4 Btu/h ft 2 for space conditioning. Workbook Page Designers Tip: Low Energy Buildings Buildings, or portions thereof, that are not conditioned are exempt from thermal envelope requirements. Workbook Page Alternative Materials Methods of Construction Design or Insulating Systems Above code program Authority to approve above code program is vested in the code official. Language does not guarantee alternative programs exceed the performance required by IECC Burden of proof to establish equivalency is on the applicant. Workbook Page Provisions for Designers 18

19 Designers Tip Be aware of the goals of the above code programs as they may not be energy focused. Workbook Page Construction Documents Information about the following systems, which can be presented in a number of ways, should be included on the plans: Building envelope Mechanical system Lighting system Service water heating Workbook Page Provisions for Designers 19

20 103 Construction Documents Information on Construction Documents Level of efficiency used to demonstrate compliance with the code must be clearly identified Complete set of building plans with efficiency requirements clearly labeled Workbook Page Construction Documents Information can be presented in a number of ways: On the drawings. On sections and in schedules. Through notes and callouts. Through supplementary worksheets or calculations. Workbook Page Activity: Reading an ES report for Air Barriers 60 Provisions for Designers 20

21 Activity: Reading an ES report for Air Barriers 61 Activity: Reading an ES report for Air Barriers 62 Activity: Reading an ES report for Air Barriers 63 Provisions for Designers 21

22 103 Construction Documents Examination of documents This section of the code covers the examination of documents and the various types of approvals that the code official will deal with on both new and existing buildings. Workbook Page Inspections The code states: All construction is subject to inspection. Construction shall not be concealed without inspection approval. A final inspection is required before occupancy. A building shall be reinspected when determined necessary by the code official. Workbook Page Referenced Standards Conflicting requirements Code takes precedence when the requirements of the standard conflict with the requirements of the code Workbook Page Provisions for Designers 22

23 106 Referenced Standards Other laws The provisions of this code shall not be deemed to nullify any provisions of local, state, or federal law. Workbook Page Module IECC Chapter 2 Definitions 202 General Definitions Above-grade Wall Air Barrier Basement Wall Building Thermal Envelope Commercial Building Conditioned Space Exterior Wall Heated Slab Residential Building Workbook Page Provisions for Designers 23

24 Module IECC Chapter 3 General Requirements Design Conditions Three separate moisture regimes overlay the eight climate zones Workbook Page Design conditions Section 302.1, page Interior design conditions This section refers to the heating and cooling load for the building. The interior design temperatures used for heating and cooling load calculations shall be a maximum of 72ºF (22ºC) for heating and minimum of 75ºF (24ºC) for cooling. Workbook Page Provisions for Designers 24

25 303 Materials, Systems, and Equipment Identification Requires materials to be labeled on site with the rated R-value Workbook Page Materials, Systems, and Equipment Fenestration product rating Workbook Page Materials, Systems, and Equipment Table (1) Default Glazed Fenestration U-Factor Table (2) Default Door U-Factors Table (3) Default Glazed Fenestration SHGC Workbook Page Provisions for Designers 25

26 303 Materials, Systems, and Equipment Table (1) Default Glazed Fenestration U-Factor Workbook Page Materials, Systems, and Equipment Table (2) Default Door U-Factors Workbook Page Materials, Systems, and Equipment Table (3) Default Glazed Fenestration SHGC Workbook Page Provisions for Designers 26

27 Module IECC Chapter 4 Residential Energy Efficiency IECC Residential Compliance Process Must the project comply with the IECC? Prescriptive Path Building Thermal Envelope and Electrical Mandatory Provisions Air Leakage and Building Systems Performance Path Simulated Performance Alternative R-value Computation UA Alternative Total UA Alternative Document Compliance with IECC Plan Review Workbook Page 8 Field Inspection 80 Poorly Insulated House Photo courtesy of State of Illinois Department of Commerce and Economic Opportunity Bruce Selway Energy Efficiency Program Specialist Provisions for Designers 27

28 Ice Damming at Soffits International Energy Conservation Code of the City of Chicago Compliance Methods for Insulation and Fenestration Compliance by R-value computation Table Insulation and Fenestration Requirements by Component U-factor alternative Table Equivalent U-Factors Workbook Page Designers Tip Very important information is in Note d of Table regarding heated slab construction. R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Zones 1 through 3 for heated slabs. Workbook Page Provisions for Designers 28

29 10/13 10/13 Workbook Page 32 Table Workbook Page Designers Tip There is no column for slab insulation in Table , use Table Refer to Sections , , and for specific differences. Workbook Page Provisions for Designers 29

30 Compliance Methods for Insulation and Fenestration Determining compliance An assembly U-factor must be calculated for each applicable assembly type proposed for the project. Either ASHRAE Handbook of Fundamentals or ASHRAE 90.1 Appendix A is an excellent source of information on how to calculate an assembly U-factor. Workbook Page Compliance Methods for Insulation and Fenestration Calculating assembly U-factors The calculation must include the effects of framing. An R-value must be determined for each different material in the assembly. The R-values are then totaled to determine the total R-value through each thermal path of the assembly. Workbook Page Compliance Methods for Insulation and Fenestration Calculating assembly U-factors (cont.) The total R-values are then converted to U-factors by taking the reciprocal of the R-value. An area-weighted average U-factor is calculated for the wall system that takes into account the effects of framing. Workbook Page Provisions for Designers 30

31 Compliance Methods for Insulation and Fenestration Sample calculation Walls U ow = (U wl x A wl ) + (U w2 x A w2 ) + A w1 + A w2 + Workbook Page 34 Where U wl = U-factor of opaque wall number 1 Awl = Area of opaque wall number 1 U w2 = U-factor of opaque wall number 2 A w2 = Area of opaque wall number 2 91 Compliance Methods for Insulation and Fenestration Total UA alternative The building envelope design is permitted to deviate from R-values or U-factors in Tables or , respectively, provided the total thermal transmittance (UA) is the same or less as the very same building envelope geometry designed to code. Workbook Page Compliance Methods for Insulation and Fenestration Total UA alternative The UA alternative is offered to provide tradeoffs between parts of the building that do not comply pywith the U-factors listed in Table and those that over comply with the code. Workbook Page Provisions for Designers 31

32 Total UA Alternative But Wait. THERE S MORE! 94 Step 1: Verify the project information matches the information on the plans. The code, city and state, and construction type will impact energy code compliance. Workbook Page 95 Step 2: Verify the project complies with the applicable code. The Maximum UA must be greater than or equal to Your UA to demonstrate compliance. Workbook Page 96 Provisions for Designers 32

33 Workbook Page Step 3: Verify the correct Assembly components for the building envelope are shown. For example, a floor over a crawl is vented to the outside; the crawl wall would not be part of the building envelope and should not be shown on the report. 97 Step 4: Verify the Gross Area or Perimeter values represent the proposed house. Verify window area is correct by using rough opening as shown on the plans. Walls that separate conditioned from unconditioned spaces, such as a garage, should be included in the wall area. Workbook Page 98 Step 5: Verify the insulation R-values shown on the building plans meet or exceed the values in the Cavity R-Value and/or Continuous R-Value section. Verify the insulation will fit uncompressed in the framing cavity. Continuous R- values are for insulation installed over the face of the faming. Workbook Page 99 Provisions for Designers 33

34 Step 6: Verify the window and door U-factors shown on the building plans meet or exceed what is shown on the documentation. Workbook Page IBC Accessibility 102 Provisions for Designers 34

35 IBC Accessibility 104 Workbook Page 105 Provisions for Designers 35

36 Workbook Page 106 Compliance Methods for Insulation and Fenestration Ceilings with attic spaces R-38 = R-49 FULL DEPTH - REDUCED DEPTH 2009 IECC Fundamentals Workbook Page Compliance Methods for Insulation and Fenestration Ceilings without attic spaces Where Section would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space for the required insulation, the minimum required insulation for such roof/ceiling assemblies shall be R-30. This reduction of insulation from the requirements of Section shall be limited to 500 square feet (46 m 2 ) or 20 percent of the total insulated ceiling area, whichever is less. This reduction shall not apply to the U-factor alternative approach in Section and the total UA alternative in Section Workbook Page Provisions for Designers 36

37 Designers Tip Other than crawl spaces, perhaps one of the most frequent locations of design confusion is ceilings without attic spaces, or cathedral ceilings. The design professional may find manufacturers who insist that their product may be installed without vapor retarder, which may be verified through ICC ES reports. Please take the time to familiarize yourself with Section R806.4 and Table R NOTE: Although the IRC section is entitled Unvented attic assemblies, it applies to ceilings without attics as well, since the assemblies are virtually the same. Workbook Page Compliance Methods for Insulation and Fenestration Access hatches and doors. Access doors from conditioned spaces to unconditioned spaces (e.g., attics and crawl spaces) shall be weather stripped and insulated to a level equivalent to the insulation on the surrounding surfaces. Access shall be provided to all equipment that prevents damaging or compressing the insulation. A wood framed or equivalent baffle or retainer is required to be provided when loose fill insulation is installed, the purpose of which is to prevent the loose fill insulation from spilling into the living space when the attic access is opened, and to provide a permanent means of maintaining the installed R- value of the loose fill insulation. Workbook Page Compliance Methods for Insulation and Fenestration Exterior walls Any wall between conditioned and unconditioned space and the great outdoors will count in the exterior wall area. This includes: Attic kneewalls. Skylight shaft walls. Below-grade nonbasement walls. Perimeter joists between floors. Workbook Page Provisions for Designers 37

38 Compliance Methods for Insulation and Fenestration Examples of wall insulation Workbook Page 41 Blown-in, Loose-fill Insulation Workbook Page Compliance Methods for Insulation and Fenestration Examples of wall insulation Workbook Page 41 Unfaced-batt Insulation Workbook Page Compliance Methods for Insulation and Fenestration Examples of wall insulation Blown-in, Loose-fill Insulation 2009 IECC Fundamentals Workbook Page Provisions for Designers 38

39 Uninsulated Soffit Uninsulated Soffit Photo Courtesy of State of Illinois Department of Commerce and Economic Opportunity Workbook Page 41 Bruce Selway Energy Efficiency Program Specialist Basement Walls 8 inch Stud Wall ICF Wall Workbook Page 42 Photo courtesy of State of Illinois Department of Commerce and Economic Opportunity Bruce Selway Energy Efficiency Program Specialist Compliance Methods for Insulation and Fenestration Basement walls Defined as walls greater than or equal to 50 percent below grade. Workbook Page Provisions for Designers 39

40 Compliance Methods for Insulation and Fenestration Basement walls In the walk-out basement illustrated in the previous slide, the rear wall is 90 to 100 percent below grade and would be considered a true basement wall. The sidewalls are considered basement walls because they are on average 50 percent or greater below grade. Since the front wall is less than 50 percent below grade, it would be considered an exterior wall. Workbook Page Designers Tip This allowance, which relocates the edge of the conditioned envelope to the exterior wall from the bottom of the floor above, results in some confusion for the designer. It is important that the designer identify the conditioned envelope and insulate only at those locations that comprise the envelope. Insulating a wall of an unconditioned crawl space adds unnecessary cost to the project, and there is genuine energy loss if exterior ventilation is introduced into a conditioned crawl space. Workbook Page Compliance Methods for Insulation and Fenestration Slab-ongrade floors Workbook Page Provisions for Designers 40

41 Compliance Methods for Insulation and Fenestration Crawl space walls Criteria to meet code requirements: Must be insulated to the R-value specified in the energy code May not have ventilation openings that communicate directly with outside air. Must be mechanically ventilated or supplied with conditioned air. Exposed earth floors must be covered with an approved vapor retarder material, which extends up the stem wall and then sealed and taped to the wall. Workbook Page 43 Compliance Methods for Insulation and Fenestration , Thermally isolated sunrooms To condition the sunroom, the following requirements must be met: A separate space conditioning system. The glass used must have a maximum U-factor of 0.75 in climate zones 1-3 and 0.50 inches in climate zones 4-8. Minimum ceiling R-value shall be R-19 in zones 1-4 and R-24 in zones 5-8. Minimum wall R-value shall be R-13. Workbook Page Designers Tip Please refer to the definitions a separate zone is also permitted. THERMAL ISOLATION. Physical and space conditioning separation from conditioned space(s). The conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment. Workbook Page Provisions for Designers 41

42 Compliance Methods for Insulation and Fenestration , Thermally isolated sunrooms To condition the sunroom, the following requirements must be met: A separate space conditioning system. The glass used must have a maximum U-factor of 0.75 in climate zones 1-3 and 0.50 inches in climate zones 4-8. Minimum ceiling R-value shall be R-19 in zones 1-4 and R-24 in zones 5-8. Minimum wall R-value shall be R-13. Workbook Page Designers Tip Please review Section 402; the 0.75 U-factor applies to skylights. Excerpt from Table Workbook Page Compliance Methods for Insulation and Fenestration , Thermally isolated sunrooms To condition the sunroom, the following requirements must be met: A separate space conditioning system. The glass used must have a maximum U-factor of 0.75 in climate zones 1-3 and 0.50 inches in climate zones 4-8. Minimum ceiling R-value shall be R-19 in zones 1-4 and R-24 in zones 5-8. Minimum wall R-value shall be R-13. Workbook Page Provisions for Designers 42

43 Designers Tip The sunroom must maintain thermal isolation. THERMAL ISOLATION. Physical and space conditioning separation from conditioned space(s). The conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment. Considering this definition, a sunroom can be constructed without thermal isolation utilizing Total UA or Simulated Performance Alternative. Workbook Page Compliance Methods for Insulation and Fenestration Workbook Page Compliance Methods for Insulation and Fenestration Fenestration (Prescriptive) U-factor Area weighted average U-factors and SHGCs may be used to comply with Table Up to 15 ft 2 of glazed fenestration per dwelling unit can be exempted from U-factor and SHGC requirements if you are using R-value computation method. Workbook Page Provisions for Designers 43

44 Compliance Methods for Insulation and Fenestration Glazed fenestration SHGC and Glazed fenestration exemption Note also that up to 15 square feet (1.4 m 2 ) of glazed fenestration per dwelling unit can be exempted from U-factor and SHGC requirements in its entirety, if you are using the R-value computation method. Workbook Page Compliance Methods for Insulation and Fenestration Opaque door exemption: One hinged opaque door up to 24 square feet (2.22m 2 ) is also exempt from the code as well, if you are using the R- value computation method Replacement fenestration Replacement windows and skylights must comply with the fenestration U-factor requirements of Table Workbook Page , 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Building thermal envelope 1. All joints, seams and 6. Knee walls. penetrations. 7. Walls and ceilings separating a 2. Site-built windows, doors and garage from conditioned spaces. skylights. 8. Behind tubs and showers on 3. Openings between window and exterior walls. door assemblies and their 9. Common walls between dwelling respective jambs and framing. units. 4. Utility penetrations. 10. Attic access openings. 5. Dropped ceilings or chases 11. Rim joist junction. adjacent to the thermal envelope. 12. Other sources of infiltration. Workbook Page Provisions for Designers 44

45 402.4, 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Air Sealing and Insulation Building envelope air tightness and insulation shall be demonstrated by either a testing OR visual inspection option Workbook Page , 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Testing option Testing to show the building air leakage is less than seven air changes per hour when tested with a blower door at 50 Pascals. Workbook Page , 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Visual inspection option Follows table and can include a independent third party if approved by the code official. Workbook Page Provisions for Designers 45

46 , 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Fireplaces Wood-burning fireplaces are now required to have gasketed doors, and must draw combustion air from the outside. Outside combustion air poses a possible conflict with the IRC for fireplaces in basement (see tip). The exterior air intake shall be capable of supplying all combustion air from the exterior of the dwelling or from spaces within the dwelling ventilated with outside air such as nonmechanically ventilated crawl or attic spaces. The exterior air intake shall not be located within the garage or basement of the dwelling nor shall the air intake be located at an elevation higher than the firebox. The exterior air intake shall be covered with a corrosion-resistant screen of ¼-inch (6 mm) mesh. Workbook Page Designers Tip Using outside combustion air to vent fi replaces in basements poses a possible challenge to achieve considering the requirements of IRC Section R below. R Exterior air intake. The exterior air intake shall be capable of supplying all combustion air from the exterior of the dwelling or from spaces within the dwelling ventilated with outside air such as nonmechanically ventilated crawl or attic spaces. The exterior air intake shall not be located within the garage or basement of the dwelling nor shall the air intake be located at an elevation higher than the firebox. The exterior air intake shall be covered with a corrosionresistant screen of ¼-inch (6 mm) mesh. The designer needs to find a solution to satisfy both code sections to ensure safety and efficiency. Workbook Page Provisions for Designers 46

47 402.4, 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Fenestration air leakage Workbook Page , 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Recessed lighting Workbook Page , 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Moisture control (see IRC Section R601.3 and IBC Section ) Workbook Page Provisions for Designers 47

48 402.4, 402.5, 402.6, 403 Mandatory Requirements for all Residential Buildings Maximum fenestration U-factor and SHGC(Mandatory). The area-weighted average maximum fenestration U-factor permitted using trade-offs from Section or 405 shall be 0.48 in Zones 4 and 5 and 0.40 in Zones 6 through 8 for vertical fenestration, and 0.75 in Zones 4 through 8 for skylights. Workbook Page Building Systems The building systems addressed consist of a heating and/or cooling system, a distribution system and temperature controls. Workbook Page Building Systems Programmable Thermostat If there is forced air heating, at least one of the systems shall be equipped with a setback thermostat. Details the requirements for programmable thermostats. Section , page 30 Workbook Page Provisions for Designers 48

49 403 Building Systems Heat pump supplementary heat (Mandatory) Heat pumps require a special heat pump thermostat that prevents supplementary electric resistance heat from coming on when the heat pump can handle the load. This allows the system to use the efficient i heat pump for heating. A two-stage thermostat that controls the back-up heat on its second stage meets this requirement. Workbook Page Building Systems Ducts Insulation Supply ducts located in attics shall be insulated to R-8. All other ducts shall be insulated to R-5. Workbook Page Building Systems Sealing (Mandatory) All ducts are required to be sealed with: Listed and labeled tapes Gaskets Mastics (adhesives) Mastic-plus-embedded fabric systems or Other approved closure systems Workbook Page Provisions for Designers 49

50 403 Building Systems Duct construction 2009 IECC Fundamentals Workbook Page Building Systems Sealing (Mandatory) Duct tightness shall be verified by verified by either of the following: 1.Post construction test: a. Leakage to outdoors 8cfm/100 s.f. b. Total Leakage 12cfm/100 s.f 2.Rough in test: a. Total Leakage 6 cfm/100 s.f. including air handler b. Total Leakage 4 cfm/100 s.f w/o air handler Exception: Duct tightness test is not required if the air handler and all ducts are located within conditioned space IECC Fundamentals Workbook Page Building Systems Mechanical system insulation HVAC piping located in unconditioned spaces and conveying fluids greater than 105 F (41 C) or less than 55 F (13 C) must be insulated to R-3. Typically, this will apply to refrigerant piping and water piping for hydronic heating systems. Workbook Page Provisions for Designers 50

51 403 Building Systems Circulating water systems An automatic or manual on/off switch is required to turn the circulation off during periods of reduced demand or when the circulating hot water system is not in operation. Workbook Page Building Systems Equipment sizing IECC refers to the provisions of the IRC to require heating and cooling load calculations for the optimal sizing of equipment. The following guidelines apply: Use Design conditions specified in IECC Chapter 3. Part IV Mechanical of the IRC refers specifically to the Air Conditioning Contractors of America (ACCA) Manual J for building loads (IRC Section M1401.3). Part IV Mechanical of the IRC refers specifically to the Air Conditioning Contractors of America (ACCA) Manual S for sizing equipment (IRC Section M1401.3). Workbook Page Building Systems Equipment sizing Oversized Air Conditioning Equipment Results in Short Cycling Impacts of oversizing are: Reduces equipment life Reduces efficiency (SEER) Results in poor dehumidification Reduces filter effectiveness Increased initial equipment cost Higher utility bills Workbook Page Provisions for Designers 51

52 403 Building Systems Snow melt system controls (Mandatory). Snow- and ice-melting systems shall include automatic controls capable of shutting off the system when the pavement temperature is above 50 F (10 C) C), no precipitation is falling and the outdoor temperature is above 40 F (4 C). Workbook Page Building Systems Pools (Mandatory) Pool heaters. All pool heaters shall be equipped with a readily accessible on-off switch to allow shutting off the heater without adjusting the thermostat setting. Pool heaters fired by natural or LP gas shall not have continuously burning pilot lights. Workbook Page Building Systems Time switches. Time switches to automatically turn off and on heaters and pumps according to a preset schedule shall be installed on swimming pool heaters and pumps. The two exceptions address public health standards and circumstances where the pumps serve pools with solar-waste-heat recovery heating systems. Workbook Page Provisions for Designers 52

53 403 Building Systems Lighting equipment (Prescriptive) A minimum of 50 percent of the lamps in permanently installed lighting fixtures shall be high-efficiency lamps. Workbook Page Simulated Performance Alternative An energy estimation tool is used to compare the energy use of the proposed design with that of the standard design building, just meeting the minimum code requirements. Workbook Page Simulated Performance Alternative Documentation A comparative compliance report which clearly depicts the annual energy costs of both standard and proposed designs must accompany all submittals demonstrating compliance under the simulated performance alternative. Workbook Page Provisions for Designers 53

54 405 Simulated Performance Alternative Residence specifications Table (1) - Specifications for the Standard Reference and Proposed Designs Building Component Standard Reference Design Proposed Design Workbook Page Table (1), page 34 Workbook Page Table (1), page 35 Workbook Page Provisions for Designers 54

55 2009 IECC Fundamentals IECC Fundamentals IECC Fundamentals 165 Provisions for Designers 55

56 2009 IECC Fundamentals 166 Table (1), page 36 Workbook Page Highlights of Table (1) Table (1) Glazing Workbook Page Provisions for Designers 56

57 405 Simulated Performance Alternative Table (1) Skylights and thermally isolated sunrooms Table (1) Orientation for groups of buildings Table (1) Fenestration system solar heat gain coefficient, standard design Workbook Page Simulated Performance Alternative Tables (1) and (2) Thermal distribution system efficiency (DSE) Table (2) Default Distribution System Efficiencies for Proposed Designs Workbook Page Simulated Performance Alternative Table (1) Air exchange rate Table (2), page 36 Workbook Page Provisions for Designers 57

58 405 Simulated Performance Alternative Table (1) Air Exchange Rate Workbook Page Using Energy Compliance Software The IECC does not suggest using any energy compliance software; however, it does allow using software in the code. The information that follows provides a brief overview for REScheck Workbook Page Using Energy Compliance Software Residential Compliance Using REScheck The REScheck materials have been developed by the US Department of Energy to simplify and clarify code compliance with the International Energy Conservation Code (IECC). The REScheck residential compliance materials offer two ways to demonstrate compliance: the trade-off approach and the prescriptive packages approach. Workbook Page Provisions for Designers 58

59 Using Energy Compliance Software Using Energy Compliance Software 1. The IECC definition of a Residential Building is: a. Identical to the Group R occupancy as defined by Chapter 3 of the International Building Code. b. Limited to structures governed by the International Residential Code. c. For this code, includes R-3 buildings, as well as R-2 and R-4 buildings three stories or less in height above grade. d. For this code, all structures not included in the definition of Commercial buildings. 177 Provisions for Designers 59

60 1. The IECC definition of a Residential Building is: a. Identical to the Group R occupancy as defined by Chapter 3 of the International Building Code. b. Limited to structures governed by the International Residential Code. c. For this code, includes R-3 buildings, as well as R-2 and R-4 buildings three stories or less in height above grade. d. For this code, all structures not included in the definition of Commercial buildings Match the paraphrased definitions with the code/standard a. b. c. ABOVE-GRADE WALL. A wall more than 50 percent above grade and enclosing conditioned space. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts. Above-grade walls are those walls covered on the exterior of the building and completely above grade or walls that are more than 15 percent above grade. That portion of a wall that is not entirely below finish grade and in contact with the ground. i. ii. iii. CODE/STANDARD ANSI/ASHRAE/IES STANDARD IECC- RESIDENTIAL PROVISIONS 2009 IECC- COMMERCIAL PROVISIONS Match the paraphrased definitions with the code/standard a. b. c. ABOVE-GRADE WALL. A wall more than 50 percent above grade and enclosing conditioned space. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts. Above-grade walls are those walls covered on the exterior of the building and completely above grade or walls that are more than 15 percent above grade. That portion of a wall that is not entirely below finish grade and in contact with the ground. i. ii. iii. CODE/STANDARD ANSI/ASHRAE/IES STANDARD IECC- RESIDENTIAL PROVISIONS 2009 IECC- COMMERCIAL PROVISIONS 180 Provisions for Designers 60

61 2. Match the paraphrased definitions with the code/standard a. b. c. ABOVE-GRADE WALL. A wall more than 50 percent above grade and enclosing conditioned space. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts. Above-grade walls are those walls covered on the exterior of the building and completely above grade or walls that are more than 15 percent above grade. That portion of a wall that is not entirely below finish grade and in contact with the ground. i. ii. iii. CODE/STANDARD ANSI/ASHRAE/IES STANDARD IECC- RESIDENTIAL PROVISIONS 2009 IECC- COMMERCIAL PROVISIONS The 2009 IECC regulates the following building systems: a. Building thermal envelope, Indoor air quality, Building site location, Water utilization. b. Building orientation, HVAC, Electrical, Service water heating. c. Building thermal envelope, HVAC, Process electrical loads, Service water heating. d. Building thermal envelope, HVAC, Electrical, Service water heating The 2009 IECC regulates the following building systems: a. Building thermal envelope, Indoor air quality, Building site location, Water utilization. b. Building orientation, HVAC, Electrical, Service water heating. c. Building thermal envelope, HVAC, Process electrical loads, Service water heating. d. Building thermal envelope, HVAC, Electrical, Service water heating. 183 Provisions for Designers 61

62 4. A design professional may choose to demonstrate building thermal envelope compliance under the 2009 IECC, while the MEP compliance conforms to ANSI/ASHRAE/IES STANDARD a. Always b. Sometimes c. Never A design professional may choose to demonstrate building thermal envelope compliance under the 2009 IECC, while the MEP compliance conforms to ANSI/ASHRAE/IES STANDARD a. Always b. Sometimes c. Never Please identify the type of compliance that each of these paths demonstrate: Compliance Path Prescriptive Performance Simulated Performance Alternative R-value Computation UA Alternative Total UA Total Building Performance RESCheck 186 Provisions for Designers 62

63 5. Please identify the type of compliance that each of these paths demonstrate: Compliance Path Prescriptive Performance Simulated Performance X Alternative R-value Computation X UA Alternative X Total UA X Total Building Performance X RESCheck X X A building built and operated in compliance with the 2009 IECC will have approximately % energy cost savings over the same building built and operated in compliance with the 2006 IECC A building built and operated in compliance with the 2009 IECC will have approximately _15_% energy cost savings over the same building built and operated in compliance with the 2006 IECC. 189 Provisions for Designers 63

64 Wrap up Summary Question and answer 190 International Code is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-aia members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. Copyright Materials This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. International Code 2006 Provisions for Designers 64

65 Thanks for attending! To schedule a seminar, contact: Annie Martinez at ICC-SAFE ( ) Ext or amartinez@iccsafe.org Provisions for Designers 65