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2009 IECC TRAINING

2009 IECC TRAINING. Residential Provisions. E nergy S ystems L aboratory. 2009 IECC TRAINING. Presented by: Energy Systems Laboratory (ESL) Texas A&M University Assists municipalities and counties determine the relative impacts of local amendments to the code

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2009 IECC TRAINING

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  1. 2009 IECC TRAINING Residential Provisions Energy Systems Laboratory

  2. 2009 IECC TRAINING Presented by: Energy Systems Laboratory (ESL) Texas A&M University • Assists municipalities and counties determine the relative impacts of local amendments to the code • Report the status and effect of energy & emissions as impacted by local codes • Provides energy code training

  3. 2009 IECC TRAININGAgenda • Introductions • Legislative Background Information • SECO Rule Making • Regional Efforts • Chapters 1 to 4, 2009 IECC • International Code Compliance Calculator – IC3 • Demonstration of IC3

  4. Introductions • Me - Ed Dryden • 12 Years HVAC Industry Experience • 25 years experience in municipal code enforcement • Certified Building Official & other ICC Certifications • IAS Committee Member for 3 Years • Member of North Central Texas Council of Government’s Building & Energy Code Advisory Board • Current Building Official, City in North Texas • Instruct energy code workshops for ESL for 4 years •  You…..

  5. American Recovery and Reinvestment Act • General Requirements of ARRA • Target Benchmarks: • 2009 IECC for Residential • ASHRAE 90.1-2007 for Commercial • 90% compliance: • Model Energy Codes (state-developed) exceeding 2009 IECC or 90.1-2007 • SB16 is Texas’ response • (adopted 09 IECC effective 2012)

  6. Legislative Background Information In 2001 (SB 5) the legislature made the finding that an effective building energy code is essential to: (1)  reducing the air pollutant emissions that are affecting the health of residents of this state; (2)  moderating future peak electric power demand; (3)  assuring the reliability of the electrical grid; and (4)  controlling energy costs for residents and businesses in this state.

  7. Legislative Background Information To accomplish these findings: 1. The energy efficiency chapter of the IRC, (2000/2001 supplement) was adopted as the energy code in this state for single-family residential construction, and 2.  The IECC (2000/2001 supplement) was adopted as the energy code in this state for all other residential, commercial, and industrial construction.

  8. Legislative Background Information  A City shall establish procedures: (1)  for administration and enforcement; and (2)  to ensure that code-certified inspectors shall perform energy inspections A City may establish procedures to adopt local amendments to the energy codes, but Local amendments may not result in less stringent energy efficiency requirements in nonattainment areas and in affected counties, and Local amendments must comply with the National Appliance Energy Conservation Act

  9. Texas’ Non-attainmentand Near Non-attainment Areas

  10. Legislative Background Information If the SECO determines, based on written recommendations from the ESL, that the energy efficiency provisions of the latest editions of the IRC or the IECC for residential or commercial energy efficiency and air quality are equivalent to or more stringent than the base codes, SECO may by rule adopt and substitute in the energy code the equivalent or more stringent editions

  11. Legislative Background Information Effective January 1, 2012, the energy efficiency provisions of the International Residential Code as they existed on May 1, 2009, are adopted as the energy code in this state for single-family residential construction Effective April 1, 2011, the International Energy Conservation Code as it existed on May 1, 2009, is adopted as the energy code for use in this state for all residential, commercial, and industrial construction that is not single-family residential NOTE: Single family is defined as 1& 2 family detached dwellings and townhomes in the statute

  12. Legislative Background Information ESL, at the request of a City, shall determine the relative impact of proposed local amendments to an energy code, including whether proposed amendments are substantially equal to or less stringent than the unamended code.  For the purpose of establishing uniform requirements throughout a region, and on request of a council of governments, a county, or a municipality, the laboratory may recommend a climatically appropriate modification or a climate zone designation for a county or group of counties that is different from the climate zone designation in the unamended code.

  13. Legislative Background Information North Central Texas Council of Governments has reviewed and provided “recommended” amendments to the 2009 IECC and the energy provisions of the 2009 IRC “Recommended” amendments have been reviewed and approved by ESL as not less stringent Available for viewing and download at: http://www.nctcog.org/envir/SEEDevEx/codes/2009amendments.asp

  14. Chapter 1 Administrative Provisions 101.2 Scope. This code applies to residential and commercial buildings . 101.3 Intent. This code shall regulate the design and construction of buildings for the effective use of energy. This code is intended to provide flexibility to permit the use of innovative approaches and techniques to achieve the effective use of energy. This code is not intended to abridge safety, health or environmental requirements contained in other applicable codes or ordinances.

  15. Chapter 1 Administrative Provisions 101.4 Applicability. Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive shall govern. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall govern. 101.4.1 Existing buildings. Except as specified in this chapter, this code shall not be used to require the removal, alteration or abandonment of, nor prevent the continued use and maintenance of, an existing building or building system lawfully in existence at the time of adoption of this code.

  16. Chapter 1 Administrative ProvisionsNCTCOG Recommended Amendment 101.4.2 Historic Buildings. Any building or structure that is listed in the State or National Register of Historic Places; designated as a historic property under local or state designation law or survey; certified as a contributing resource with a National Register listed or locally designated historic district; or with an opinion or certification that the property is eligible to be listed on the National or State Registers of Historic Places either individually or as a contributing building to a historic district by the State Historic Preservation Officer of the Keeper of the National Register of Historic Places, are exempt fromshall comply with all of the provisions of this code. Exception: Whenever a provision or provisions shall invalidate or jeopardize the historical designation or listing, that provision or provisions

  17. Chapter 1 Administrative Provisions 101.4.3 Additions, alterations, renovations or repairs. Additions, alterations, renovations or repairs to an existing building, building system or portion thereof shall conform to the provisions of this code as they relate to new construction without requiring the unaltered portion(s) of the existing building or building system to comply with this code. Additions, alterations, renovations or repairs shall not create an unsafe or hazardous condition or overload existing building systems. An addition shall be deemed to comply with this code if the addition alone complies or if the existing building and addition comply with this code as a single building.

  18. Chapter 1 Administrative Provisions101.4.3 Additions, alterations, renovations and repair 4 New Exceptions in 09 IECC 5. Reroofing for roofs where neither the sheathing nor the insulation is exposed. Roofs without insulation in the cavity and where the sheathing or insulation is exposed during reroofing shall be insulated either above or below the sheathing. 6. Replacement of existing doors that separate conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided, however, that an existing vestibule that separates a conditioned space from the exterior shall not be removed, 7. Alterations that replace less than 50 percent of the luminaires in a space, provided that such alterations do not increase the installed interior lighting power. 8. Alterations that replace only the bulb and ballast within the existing luminaires in a space provided that the alteration does not increase the installed interior lighting power.

  19. Chapter 1 Administrative Provisions 101.4.4 Change in occupancy or use. Spaces undergoing a change in occupancy that would result in an increase in demand for either fossil fuel or electrical energy shall comply with this code. Where the use in a space changes from one use in Table 505.5.2 to another use in Table 505.5.2, the installed lighting wattage shall comply with Section 505.5. 101.4.5 Change in space conditioning. Any nonconditioned space that is altered to become conditioned space shall be required to be brought into full compliance with this code. 101.4.6 Mixed occupancy. Where a building includes both residential and commercial occupancies, each occupancy shall be separately considered and meet the applicable provisions of Chapter 4 for residential and Chapter 5 for commercial .

  20. Chapter 1 Administrative Provisions 101.5 Compliance. Residential buildings shall meet the provisions of Chapter 4. Commercial buildings shall meet the provisions of Chapter 5. 101.5.1 Compliance materials. The code official shall be permitted to approve specific computer software, worksheets, compliance manuals and other similar materials that meet the intent of this code. 101.5.2 Low energy buildings. The following buildings, or portions thereof, separated from the remainder of the building by building thermal envelope assemblies complying with this code shall be exempt from the building thermal envelope provisions of this code: 1. Those with a peak design rate of energy usage less than 3.4 Btu/h • ft2 (10.7 W/m2) or 1.0 watt/ft2 (10.7 W/m2) of floor area for space conditioning purposes. 2. Those that do not contain conditioned space .

  21. Chapter 1 Administrative ProvisionsNCTCOG Recommended Amendment 103.1.1 Alternative compliance. A building certified by a national, state, or local accredited energy efficiency program and determined by the Energy Systems Laboratory to be in compliance with the energy efficiency requirements of this section may, at the option of the Code Official, be considered in compliance. The United States Environmental Protection Agency's Energy Star Program certification of energy code equivalency shall be considered in compliance. Reflects the mandate of Texas HB 1365, 78th Legislature

  22. Chapter 2Definitions • Air Barrier - Material(s) assembled and joined together to provide a barrier to air leakage through the building envelope. An air barrier may be a single material or a combination of materials. • Alteration - Any construction or renovation to an existing structure other than repair or addition that requires a permit. Also, a change in a mechanical system that involves an extension, addition or change to the arrangement, type or purpose of the original installation that requires a permit. • High-Efficacy Lamps. Compact fluorescent lamps, T-8 or smaller diameter linear fluorescent lamps, or lamps with a minimum efficacy of: • 1. 60 lumens per watt for lamps over 40 watts, • 2. 50 lumens per watt for lamps over 15 watts to 40 watts, and • 3. 40 lumens per watt for lamps 15 watts or less.

  23. Chapter 2Definitions • 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. • Roof Assembly - A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof covering, underlayment, roof deck, insulation, vapor retarder and interior finish. • Sunroom - A one-story structure attached to a dwelling with a glazing area in excess of 40 percent of the gross area of the structure's exterior walls and roof. • 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.

  24. Chapter 3Climate Zones

  25. Chapter 3Climate Zones • 302.1 Interior design conditions. The interior design temperatures used for heating & cooling load calculations shall be a maximum of 72°F for heating and minimum of 75°F for cooling. • 303.1 Identification. Materials, systems and equipment shall be identified… • 303.1.1 Building thermal envelope insulation. • Insulation marked with an R -value ; or, • The insulation installers shall provide a certification listing the type, manufacturer and R -value of insulation installed in each element of the building thermal envelope .

  26. Chapter 3Climate Zones • 303.1.1 Building thermal envelope insulation. • For blown or sprayed insulation (fiberglass and cellulose): • the initial installed thickness, • settled thickness, • settled R -value, • installed density, • coverage area, and • number of bags • For sprayed polyurethane foam (SPF) insulation: • the installed thickness of the areas covered, and • R- value of installed thickness shall be listed on the certification. • The insulation installer shall sign, date and post the certification in a conspicuous location on the job site.

  27. Chapter 3Climate Zones • 303.1.1.1 Blown or sprayed roof/ceiling insulation. • The thickness of blown-in or sprayed roof/ceiling insulation (fiberglass or cellulose) shall be written in inches on markers that are installed at least one for every 300 square feet throughout the attic space. The markers shall be affixed to the trusses or joists and marked with the minimum initial installed thickness with numbers a minimum of 1 inch in height. Each marker shall face the attic access opening. Spray polyurethane foam thickness and installed R- value shall be listed on certification provided by the insulation installer. • 303.1.2 Insulation mark installation. • Insulating materials shall be installed such that the manufacturer's R -value mark is readily observable upon inspection.

  28. Chapter 3Climate Zones • 303.1.3 Fenestration product rating. • U -factors of fenestration products (windows, doors and skylights) shall be determined in accordance with NFRC 100 by an accredited, independent laboratory, and labeled and certified by the manufacturer. • Products lacking such a labeled U -factor shall be assigned a default U -factor from Table 303.1.3(1) or 303.1.3(2). • The solar heat gain coefficient (SHGC) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. • Products lacking such a labeled SHGC shall be assigned a default SHGC from Table 303.1.3(3).

  29. Chapter 3Climate Zones • (insert table)

  30. Chapter 3Climate Zones • TABLE 303.1.3(3) • DEFAULT GLAZED FENESTRATION SHGC • (insert table)

  31. Chapter 3Climate Zones • (insert table)

  32. Chapter 3Climate Zones • NEW in 2009 IECC • 303.1.4 Insulation product rating. The thermal resistance (R- value) of insulation shall be determined in accordance with the U.S. Federal Trade Commission R -value rule (CFR Title 16, Part 460, May 31, 2005) in units of h × ft2 × °F/Btu at a mean temperature of 75°F (24°C).

  33. Chapter 4Residential Provisions • CHAPTER 4 • RESIDENTIAL ENERGY EFFICIENCY • SECTION 401 – GENERAL • SECTION 402 - BUILDING THERMAL ENVELOPE • SECTION 403 – SYSTEMS • SECTION 404 - ELECTRICAL POWER AND LIGHTING SYSTEMS • SECTION 405 - SIMULATED PERFORMANCE ALTERNATIVE (Performance)

  34. Chapter 4 Compliance Options • 401.1 Scope - This chapter applies to residential buildings. • 401.2 Compliance - Must comply with either prescriptive provisions: • 402.1 thru 402.3 (Insulation & Fenestration), • 403.2.1 (Duct Insulation) , and • 404 (Lighting) • Or: • 405 – Performance provisions • AND…….. • 8 Mandatory Provisions

  35. Chapter 4 Residential Provisions • 8 Mandatory Provisions: • 401 – Compliance statement • 402.4 – Air leakage Requirements • 402.5 – Max fenestration U-factor & SHGC (Area weighted averages) • 403.1 – Mechanical Systems Controls • 403.2.2 –HVAC Duct Sealing • 402.2.3 – Building Cavities not used as supply ducts • 403.3 thru 403.9 – Piping insulation, ventilation, complex systems, snow melt, and swimming pools

  36. Chapter 4 401.3 Certificate • NEW in 2009 IECC • 401.3 Certificate - A permanent certificate • Shall be posted on or in the electrical distribution panel • Shall be completed by the builder or registered design professional • Shall list the predominant R -values of insulation installed in or on ceiling/roof, walls, foundation (slab, basement wall, crawlspace wall and/or floor) and ducts outside conditioned spaces; U -factors for fenestration and the solar heat gain coefficient (SHGC) of fenestration • Shall list the types and efficiencies of heating, cooling and service water heating equipment • ID "gas-fired unvented room heater," "electric furnace" or "baseboard electric heater," as appropriate • An efficiency shall not be listed for gas-fired unvented room heaters, electric furnaces or electric baseboard heaters.

  37. Prescriptive U-Factor and “UA” Alternatives Component values from: Table 402.1.1 Plus Mandatory Provisions U-factor 402.1.3 or Total Building UA 402.1.4 Chapter 4 Residential Provisions Simulated Performance (software) Simulated Performance Alternative 405

  38. Chapter 4 Residential Provisions

  39. Chapter 4402.2 Specific insulation requirements (Prescriptive). 402.2.1 Ceilings with attic spaces - Where R38 is required, may be reduced to R30 when raised heel trusses are used. Same trade off if R49 is required - R38 allowed when raised heel trusses are used. 402.2.2 Ceilings without attic spaces - Where insulation levels above R-30 are required 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 but only limited to 500 square feet (46 m2) or 20 percent of the total insulated ceiling area, whichever is less. Neither of these applicable to U-factor alternative approach

  40. Chapter 4 Residential Provisions 402.1.2 R- value computation. Insulation material used in layers, such as framing cavity insulation and insulating sheathing, shall be summed to compute the component R -value. The manufacturer's settled R -value shall be used for blown insulation. Computed R -values shall not include an R -value for other building materials or air films. 402.1.3 U -factor alternative. An assembly with a U -factor equal to or less than that specified in Table 402.1.3 shall be permitted as an alternative to the R -value in Table 402.1.1. U -factor alternative shall include the thermal bridging effects of framing materials and the SHGC requirements shall be met in addition to UA compliance.

  41. Chapter 4 Residential Provisions

  42. Chapter 4 - Residential Provisions402.1.3 - U-Factors Alternative An assembly (roof, wall, floor) with a U-factor equal to or less than value specified in Table 403.1.3 is permitted as an alternative to the R-value specified in Table 402.1.1 (prescriptive table)

  43. Chapter 4 - Residential ProvisionsCalculating Assembly U-Factors • An area-weighted average U-factor is calculated for the wall system that takes into account the effects of framing and systems • 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 • The total R-values are then converted to U-factors by taking the reciprocal of the R-value

  44. (Uwl x Awl) + (Uw2 x Aw2) + … Uow= Aw1+ Aw2 + … Sample Calculation - Walls • Where • Uwl = U-factor of opaque wall number 1 • Awl = Area of opaque wall number 1 • Uw2 = U-factor of opaque wall number 2 • Aw2 = Area of opaque wall number 2

  45. 402.1.4 Total UA Alternative • The building envelope design is permitted to deviate from R-values or U-factors in Tables 402.1.1 or 402.1.3, respectively, provided the total thermal transmittance (UA) is the same or less as the very same building envelope geometry designed to code • The calculation shall be done using a method consistent with the ASHRAE Handbook of Fundamentals and shall include the thermal bridging effects of framing materials • SHGC requirements shall be met

  46. 402.2.3 Access Hatches and DoorsSpecific insulation requirements (Prescriptive) • Access doors from conditioned to unconditioned spaces shall be: • Weather-stripped • Insulated to the equivalent R-value on the surrounding surfaces • A wood framed baffle or retainer is required to be provided when loose fill insulation is installed

  47. 402.2.4 Mass WallsSpecific insulation requirements (Prescriptive) • For residential purposes above-grade walls are: • Concrete block • Concrete • Insulated concrete form (ICF) • Masonry cavity • Brick (other than brick veneer) • Earth • Adobe • Compressed earth block • Rammed earth • Solid timber/logs

  48. 402.2.5 Steel Framing Specific insulation requirements (Prescriptive) • Steel framing ceilings, walls and floors shall meet the insulation requirements of Table 402.2.5 or the U-factor requirements in Table 402.1.3 Dietrich Metal Framing

  49. 402.2.6 Floors Specific insulation requirements (Prescriptive) • Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking

  50. 402.2.7 Basement Walls Specific insulation requirements (Prescriptive) • Defined as walls greater than or equal to 50 percent below grade • Insulate from the top of the basement wall down 10 feet below grade or to the basement floor, whichever is less

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