ENERGY CODES IN TEXAS                       Energy                       Systems                       Laboratory         ...
Energy Codes in Texas• ESL’s role in TBEPS Adoption Process(SECO- Rulemaking)• 2009 IECC Analysis for TexasJurisdictions• ...
Texas Building Energy Codes                       SB 12/HB 3693-2007             Amended Chapter 388:                 De...
Texas Building Energy Codes                     ICC Published New IECC-IRC         In 2009 ICC published new editions, tri...
Texas Building Energy Codes                         SECO Rulemaking          January-2010: stakeholder meeting held to ga...
Texas Building Energy Codes        Final Rule: §19.53.Building Energy Efficiency Performance           Standards          ...
2010 Texas Jurisdiction Energy Code Adoption SurveyIn February, 2010, The Energy Systems Laboratory at Texas A&M Universit...
2011 Texas Jurisdiction Energy Code Adoption SurveyIn February, 2011, The Energy Systems Laboratory at Texas A&M Universit...
ESL- Technical Support to Texas Jurisdictions                   Typical Amendment Review RequestTo: Energy Systems Laborat...
ESL- Technical Support to Texas Jurisdictions                                Amendment Review Example This change is recom...
ESL working with Texas cities…….With each newly adopted code, the ESL provides an analysis anddevelops a report which pres...
Energy                               SUPPORT TO TEXAS JURISDICTIONSSystems             2011 Building Officials Association...
El Paso - Climate Zone 3Energy                                      SUPPORT TO TEXAS JURISDICTIONSSystems                 ...
Sample of Texas 2009 IECC Analysis    Energy                                   SUPPORT TO TEXAS JURISDICTIONS    Systems  ...
EnergySystemsLaboratory             Energy                               SUPPORT TO TEXAS JURISDICTIONS             System...
Sample of Texas 2009 IECC Analysis     Energy                                   SUPPORT TO TEXAS JURISDICTIONS     Systems...
15% Above-Code Savings in Climate Zone 3             Energy                                       SUPPORT TO TEXAS JURISDI...
Energy                               SUPPORT TO TEXAS JURISDICTIONSEnergy       Systems                          2011 Buil...
Energy              Systems              LaboratoryEnergy                               SUPPORT TO TEXAS JURISDICTIONSSyst...
EnergySystemsLaboratoryBroken down into Heat Pump or Natural Gas             Energy                               SUPPORT ...
EnergySystemsLaboratory             Combinations of measures….                Energy                                 SUPPO...
Energy             …with % savings and simple payback…SystemsLaboratory                 Energy                            ...
…and emissions reductions calculations…EnergySystemsLaboratory                  Energy                                  SU...
Simplified combinations of measures to achieve15% above the 2009 IECC!        Energy                                   SUP...
Energy                               SUPPORT TO TEXAS JURISDICTIONSEnergy       Systems                          2011 Buil...
What about the 2012 IECC?              Energy                                  SUPPORT TO TEXAS JURISDICTIONSEnergySystems...
Current project for City of Arlington, TexasArlington, Texas funded ESL to perform acustomized analysis to help develop lo...
Arlington, Texas ProjectThis project is based on goal to determineimpact of moving from the 2003 IECC to the2009 IECC!   E...
Arlington, Texas ProjectReviewed 2 years of permit data to documentmost commonly used EE practicesDetermined which practic...
Arlington, Texas ProjectCompared all individual measures against 2003IECC to determine above-code savingsCombined groups o...
Arlington, Texas ProjectSeries of stakeholder task force meetings toreview ESL analysisCombined ESL/Task Force Final Repor...
Proposed Energy Efficiency Measures (EEMs)                              2009 IECC Code-Compliant House with Heat Pump Heat...
Energy        Systems                      Proposed Energy Efficiency Measures (EEMs)        Laboratory                   ...
D                                Lighting Measures                  Proposed Energy Efficiency Measures (EEMs)15 75% Energ...
What about the new 2012 IECC?In 2011 ICC published new editions, triggering the SECO   review and energy codes update proc...
Thank You!Please visit our website at Esl.tamu.edu for reports and information!         Energy                            ...
Contact Information: Cyndi LewisTexas Emission Reduction Plan Manager- ESL      Phone: 979-777-3165 Email: cyndim@tamu.edu...
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Session 5A - Cynthia Lewis

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Cynthia Lewis, Manager, Energy Systems Laboratory, Texas Engineering Experiment Station Presentation

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Transcript of "Session 5A - Cynthia Lewis"

  1. 1. ENERGY CODES IN TEXAS Energy Systems Laboratory 2011 ESL PresentationsEnergy SUPPORT TO TEXAS JURISDICTIONSSystems 2011 Building Officials Association of Texas - Mid Year Meeting 1Laboratory
  2. 2. Energy Codes in Texas• ESL’s role in TBEPS Adoption Process(SECO- Rulemaking)• 2009 IECC Analysis for TexasJurisdictions• What about 2012? Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 2 Laboratory
  3. 3. Texas Building Energy Codes SB 12/HB 3693-2007  Amended Chapter 388:  Delegated SECO the authority to adopt by rule the latest published editions of:  Energy requirements (Chapter 11) International Residential Code (IRC) for single-family construction.  International Energy Conservation Code (IECC) for other residential and commercial construction.  ESL reviews latest ICC editions to ensure stringency of the IRC and IECC compared to current adopted statewide energy codes.  Provides SECO a written recommendation based on analysis and public review.  Cities can continue to adopt local amendments  Review by the Energy Systems Laboratory (ESL) of the Energy Systems Laboratory Texas A&M UniversityESL- 2011 Texas Jurisdictions
  4. 4. Texas Building Energy Codes ICC Published New IECC-IRC In 2009 ICC published new editions, triggering the SECO review and energy codes update process:  January: IECC 2009 edition published  March: IRC 2009 edition published  May: Initial 30 days comment period on IECC  all comments were provided to ESL for a recommendation to SECO  July: initial 30 days comment period on IRC  all comments were provided to ESL for a recommendation to SECO.  September: ESL recommended SECO the adoption Energy of Chapter 11 of the 2009 IRC and 2009 IECC Systems LaboratoryESL- 2011 Texas Jurisdictions
  5. 5. Texas Building Energy Codes SECO Rulemaking  January-2010: stakeholder meeting held to gain input prior to draft rule publication.  March 2010: draft rule published for 30 days comment.  1,057 sets of comments received  Elected officials, trade associations, builders, architects, environmental advocates  June-2010: final rule published Energy Systems LaboratoryESL- 2011 Texas Jurisdictions
  6. 6. Texas Building Energy Codes Final Rule: §19.53.Building Energy Efficiency Performance Standards (a) Single-family residential construction. Effective January 1, 2012, the energy efficiency provisions (Chapter 11) 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 as it is defined in Health and Safety Code, §388.002(12). (b) All other residential, commercial, and industrial 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 construction under subsection (a) of this section. Energy Systems LaboratoryESL- 2011 Texas Jurisdictions
  7. 7. 2010 Texas Jurisdiction Energy Code Adoption SurveyIn February, 2010, The Energy Systems Laboratory at Texas A&M University conducted a CodeSurvey of Texas Jurisdictions having populations greater than 25,000. The results for EnergyCode Adoption are as follows: 17 Texas cities had adopted the 2009. City Code Year Flower Mound 2006 Missouri City 2006 Abilene 2000 Fort Worth 2003 Nacogdoches 2006 Addison 2006 Friendswood 2009 New Braunfels 2006 Allen 2006 Frisco 2006 North Richland Hills 2000 Amarillo 2006 Galveston 2009 Odessa 2006 Angleton None Garland 2003 Paris 2000 Arlington 2003 Georgetown 2000 Pasadena 2006 Austin 2009 Grand Prairie 2003 Pearland 2006 Baytown 2006 Grapevine 2000 Pflugerville 2006 Beaumont 2009 Greenville 2006 Pharr 2003 Bedford 2000 Haltom City 2003 Plano 2006 Big Spring 2006 Harker Heights 2009 Port Arthur 2006 Borger 2000 Harlingen 2006 Richardson 2006 Rockwall 2006 Brownsville 2006 Houston 2006 Rosenberg 2006 Bryan 2003 Huntsville 2003 Round Rock 2006 Burleson 2006 Hurst 2003 Rowlett 2006 Carrollton 2006 Irving 2006 San Angelo 2009 Cedar Hill 2006 Keller 2006 San Antonio 2009 Cedar Park 2009 Killeen 2006 San Benito 2009 Cleburne 2003 Kingsville 2000 San Juan 2006 College Station 2009 Kyle 2000 San Marcos 2003 Conroe 2000 La Porte 2006 Schertz 2006 Coppell 2006 Lake Jackson 2006 Seguin 2006 Copperas Cove 2000 Lancaster 2003 Sherman 2006 Corpus Christi 2003 Laredo 2009 Socorro 2003 Corsicana 2009 League City 2006 Southlake 2006 Dallas 2006 Leander 2009 Sugar Land 2003 Deer Park 2006 Lewisville 2006 Temple 2006 Del Rio 2003 Longview 2003 Texarkana 2004 Denton 2006 Lubbock 2000 Texas City 2006 Desoto 2003 Lufkin None The Colony 2006 Devine 2003 New Braunfels 2006 Tyler 2006 Duncanville 2006 Mansfield 2006 Victoria 2000 Eagle Pass 2009 McAllen 2006 Waco 2009 Edinburg 2006 McKinney 2006 Waxahachie 2006 El Paso 2009 Mesquite 2006 Weatherford 2003 Euless 2003 Midland 2009 Weslaco 2003 Farmers Branch 2006 Mission None Wichita Falls 2006 Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 7 Laboratory
  8. 8. 2011 Texas Jurisdiction Energy Code Adoption SurveyIn February, 2011, The Energy Systems Laboratory at Texas A&M University conducted a CodeSurvey of Texas Jurisdictions having populations greater than 25,000. The results for EnergyCode Adoption are as follows: 26 Texas cities had adopted the 2009. City Code Year Abilene 2000 Addison 2006 Allen 2006 Amarillo 2006 Angleton None Arlington 2003 Austin 2009 Baytown 2006 Beaumont 2009 Bedford 2000 Big Spring 2009 Borger 2000 Brownsville 2006 Bryan 2003 Burleson 2006 Carrollton 2009 Cedar Hill 2006 Cedar Park 2009 Cleburne 2003 College Station 2009 Conroe 2000 Coppell 2006 Copperas Cove 2000 Corpus Christi 2003 Corsicana 2009 Dallas 2006 Eagle Pass 2009 Edinburg 2006 El Paso 2009 Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 8 Laboratory
  9. 9. ESL- Technical Support to Texas Jurisdictions Typical Amendment Review RequestTo: Energy Systems LaboratoryThe City of Houston is adopting both the 2007 ASHRAE and 2009 IECCfor use in the jurisdiction and have worked to correlate them in theamendments. Attached is the amendment package for the ASHRAEdocument with the IECC amendments to follow imminently.Please review and respond at your earliest convenience.Respectfully,Sheila W. Blake CBO, MBA, LEED®APAssistant Director-City of Houston Code Enforcement Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 9 Laboratory
  10. 10. ESL- Technical Support to Texas Jurisdictions Amendment Review Example This change is recommended to mandate that cool roofs are required for low-slope roofs. This language was previously added in the prescriptive method only; but should be required for all compliance paths. 5.4.3.5 Cool roofs. Low slope roofs up to 2:12 shall be provided with a roof covering where the exterior surface has: (a) a minimum total solar reflectance of 0.70 when tested in accordance with one of the solar reflectance test methods listed below, and (b) a minimum thermal emittance of 0.75 when tested in accordance with one of the thermal emittance test methods listed below. Solar Reflectance Test Methods: ASTM C1549, ASTM E903, ASTM E1175, or ASTM E1918. Thermal Emittance Test Methods: ASTM C835, ASTM C1371, or ASTM E408. 5.5.3.1.1Cool roofs. Low slope roofs up to 2:12 shall be provided with a roof covering where the exterior surface has: (a) a minimum total solar reflectance of 0.70 when tested in accordance with one of the solar reflectance test methods listed below, and (b) a minimum thermal emittance of 0.75 when tested in accordance with one of the thermal emittance test methods listed below. Solar Reflectance Test Methods: ASTM C1549, ASTM E903, ASTM E1175, or ASTM E1918. Thermal Emittance Test Methods: ASTM C835, ASTM C1371, or ASTM E408. ESL Comment (7/22/08): This change adds stringency because it is being moved from the prescriptive section to the mandatory section, thus requiring this for all options. IECC 2001 does not appear to give roof reflectance or emittance requirements. Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 10 Laboratory
  11. 11. ESL working with Texas cities…….With each newly adopted code, the ESL provides an analysis anddevelops a report which presents detailed information about therecommendations for achieving 15% above-code energy performance.The current analysis is:• based on the 2009 International Energy Conservation Code (IECC)• performed for each Texas climate zone• provides simple payback calculations• provides total source energy savings from heating, cooling, lighting, equipment, and DHW• determines associated emissions reductionsThis information is useful to homebuilders, utility demand side energymanagers, homeowners and others who wish to construct residentialbuildings that exceed the minimum national energy code requirements Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 11 Laboratory
  12. 12. Energy SUPPORT TO TEXAS JURISDICTIONSSystems 2011 Building Officials Association of Texas - Mid Year Meeting 12Laboratory
  13. 13. El Paso - Climate Zone 3Energy SUPPORT TO TEXAS JURISDICTIONSSystems 2011 Building Officials Association of Texas - Mid Year Meeting 13Laboratory
  14. 14. Sample of Texas 2009 IECC Analysis Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 14 Laboratory
  15. 15. EnergySystemsLaboratory Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 15 Laboratory
  16. 16. Sample of Texas 2009 IECC Analysis Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 16 Laboratory
  17. 17. 15% Above-Code Savings in Climate Zone 3 Energy SUPPORT TO TEXAS JURISDICTIONSEnergy Systems 2011 Building Officials Association of Texas - Mid Year Meeting 17 LaboratorySystemsLaboratory
  18. 18. Energy SUPPORT TO TEXAS JURISDICTIONSEnergy Systems 2011 Building Officials Association of Texas - Mid Year Meeting 18Systems LaboratoryLaboratory
  19. 19. Energy Systems LaboratoryEnergy SUPPORT TO TEXAS JURISDICTIONSSystems 2011 Building Officials Association of Texas - Mid Year Meeting 19Laboratory
  20. 20. EnergySystemsLaboratoryBroken down into Heat Pump or Natural Gas Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 20 Laboratory
  21. 21. EnergySystemsLaboratory Combinations of measures…. Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 21 Laboratory
  22. 22. Energy …with % savings and simple payback…SystemsLaboratory Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 22 Laboratory
  23. 23. …and emissions reductions calculations…EnergySystemsLaboratory Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 23 Laboratory
  24. 24. Simplified combinations of measures to achieve15% above the 2009 IECC! Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 24 Laboratory
  25. 25. Energy SUPPORT TO TEXAS JURISDICTIONSEnergy Systems 2011 Building Officials Association of Texas - Mid Year Meeting 25Systems LaboratoryLaboratory
  26. 26. What about the 2012 IECC? Energy SUPPORT TO TEXAS JURISDICTIONSEnergySystems Systems 2011 Building Officials Association of Texas - Mid Year Meeting 26 LaboratoryLaboratory
  27. 27. Current project for City of Arlington, TexasArlington, Texas funded ESL to perform acustomized analysis to help develop localamendments based on regional andhistorical data……… Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 27 Laboratory
  28. 28. Arlington, Texas ProjectThis project is based on goal to determineimpact of moving from the 2003 IECC to the2009 IECC! Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 28 Laboratory
  29. 29. Arlington, Texas ProjectReviewed 2 years of permit data to documentmost commonly used EE practicesDetermined which practices made most impactthrough modeling and simulation runs Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 29 Laboratory
  30. 30. Arlington, Texas ProjectCompared all individual measures against 2003IECC to determine above-code savingsCombined groups of “best” measures based onsource/site energy savings, marginal/newsystem cost, simple payback and emissionssavings Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 30 Laboratory
  31. 31. Arlington, Texas ProjectSeries of stakeholder task force meetings toreview ESL analysisCombined ESL/Task Force Final Report andRecommendations brought before City Councilfor final adoption decision Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 31 Laboratory
  32. 32. Proposed Energy Efficiency Measures (EEMs) 2009 IECC Code-Compliant House with Heat Pump HeatingDescription of Individual Measures Annual Energy Savings Annual Estim ated Cost ($) (%) 1 Energy Sim ple Estim ated Individual Measures Savings Payback (yrs) Site Source Marginal Cost 3 New System Cost 4 ($/year) 2A Envelope and Fenestration Measures1 Radiant Barrier in Attics (w ith Ducts in Attics) 1.8% 1.8% $45 $300 - $880 6.6 - 19.52 Sealed (Unvented) Attic 4.0% 4.0% $103 $2,000 - $3,500 19.4 - 33.93 Window Shading (None to 2 ft. Eaves on All Sides) 2.1% 2.1% $55 $800 - $1,000 14.6 - 18.2 Window Shading and Redistribution (22.6% Equal Window s on All Sides w ith No4 2.9% 2.9% $74 $800 - $1,000 10.8 - 13.5 Shading to S=40.7%, N=22.6%, E/W = 13.6% w ith 2ft. Eaves on All Sides)5 Decreased Window SHGC (from .3 to .2) 2.0% 2.0% $52 $200 - $400 3.9 - 7.86 Decreased Window U Value (from .5 to .3) 3.8% 3.8% $97 $600 - $900 6.2 - 9.37 Decreased Window SHGC & U Value (from .3 to .2 SHGC & from .5 to .3 U-Value) 5.6% 5.6% $142 $900 - $1,100 6.3 - 7.8B HVAC System Measures8 Relocate Mechanical Systems w ithin Conditioned Space 6.3% 6.3% $161 $1,000 - $7,000 6.2 - 43.49 Improved Heat Pump Efficiency (from 13 to 15 SEER and from 7.7 to 8.5 HSPF) 6.7% 6.7% $171 $1,200 - $2,500 7.0 - 14.6C Dom estic Hot Water Measures13 Solar Domestic Hot Water System (32 sq. ft. collector, 65 gal tank) 7.6% 7.6% $193 $2,200 - $3,000 11.4 - 15.614 Solar Domestic Hot Water System (64 sq. ft. collector, 80 gal tank) 9.7% 9.7% $246 $3,200 - $4,000 13.0 - 16.3D Lighting Measures Arlington, TX in Tarrant County15 75% Energy Star Permanent CFL or Fluorescent Indoor Lamps 4.3% 4.3% $110 $25 - $110 0.2 - 1.0 IECC 2009 – Climate Zone 216 100% Energy Star Permanent CFL or Fluorescent Indoor Lamps 8.8% 8.8% $226 $50 - $215 0.2 - 1.0 IECC 2009 – Climate Zone 3E Renew able Pow er Measures17 4 kW Photovoltaic Array 27.1% 27.1% $692 $20,000 - $30,000 28.9 - 43.3 IECC 2009 – Climate Zone 4Description of Com bined Measures Annual Energy Savings Com bined Com bined Estim ated Cost NOx Em issions SO2 Em issions CO2 Em issions (%) 1 Energy ($) Sim ple Estim ated Savings Savings Savings Com bination of Measures 5 Savings Payback (yrs) Site Source Marginal Cost 3 New System Cost 4 Annual (lbs/yr) Annual (lbs/yr) Annual (tons 6/yr) ($/year) 2 Com bination 116 100% Energy Star Permanent CFL or Fluorescent Indoor Lamps $50 - $215 7 Decreased Window SHGC & U Value (from .3 to .2 SHGC & from .5 to .3 U-Value) 15.8% 15.8% $403 $900 - $1,100 3.1 - 5.4 5.8 3.6 2.41 Radiant Barrier in Attics (w ith Ducts in Attics) $300 - $880 Com bination 215 75% Energy Star Permanent CFL or Fluorescent Indoor Lamps $25 - $110 7 Decreased Window SHGC & U Value (from .3 to .2 SHGC & from .5 to .3 U-Value) 15.4% 15.4% $393 $900 - $1,100 5.4 - 9.4 5.7 3.6 2.4 9 Improved Heat Pump Efficiency (from 13 to 15 SEER and from 7.7 to 8.5 HSPF) $1,200 - $2,500 Com bination 3 8 Relocate Mechanical Systems w ithin Conditioned Space $1,000 - $7,000 16.0% 16.0% $407 10.3 - 27.0 5.9 3.7 2.514 Solar Domestic Hot Water System (64 sq. ft. collector, 80 gal tank) $3,200 - $4,000Note: [2009 IECC Code-Compliant House Description]1. Total energy savings from heating, cooling, lighting, equipment and DHW for emissions reductions determination. * Building type: Residential2. Energy Cost: Electricity = $0.11/kWh * Gross area: 2,325 sq-ft3. Marginal cost = new system cost - original system cost * Building dimension: 48.2ft x 48.2ft x 8ft (WxLxH)4. New system cost = new system cost only * Number of floors: 15. See individual measures above for specific savings * Floor-to-floor height: 8ft6. Conversion factor: 1 ton = 2,000 lbs * Window -to-floor ratio: 15% (Window -to-w all ratio: 22.6%) * Lighting: 50% Energy Star permanent CFL or fluorescent lamps Energy * HVAC system: SEER 13 AC and 7.7 HSPF heat pump TO TEXAS JURISDICTIONS SUPPORT Energy Systems Systems Laboratory 32 * DHW: 0.90 Building Officials Association of Texas - Mid Year Meeting 2011 EF Electric heater * Duct Location: Unconditioned, vented attic 32 Laboratory * Duct Leakage to Outdoor: 8 cfm/100 sq-ft CFA
  33. 33. Energy Systems Proposed Energy Efficiency Measures (EEMs) Laboratory 2009 IECC Code-Compliant House with Heat Pump HeatingDescription of Individual Measures Annual Energy Savings (%) 1 Individual Measures Site SourceA Envelope and Fenestration Measures 1 Radiant Barrier in Attics (w ith Ducts in Attics) 1.8% 1.8% 2 Sealed (Unvented) Attic 4.0% 4.0% 3 Window Shading (None to 2 ft. Eaves on All Sides) 2.1% 2.1% Window Shading and Redistribution (22.6% Equal Window s on All Sides w ith No 4 2.9% 2.9% Shading to S=40.7%, N=22.6%, E/W = 13.6% w ith 2ft. Eaves on All Sides) 5 Decreased Window SHGC (from .3 to .2) 2.0% 2.0% 6 Decreased Window U Value (from .5 to .3) 3.8% 3.8% 7 Decreased Window SHGC & U Value (from .3 to .2 SHGC & from .5 to .3 U-Value) 5.6% 5.6% B HVAC System Measures 8 Relocate Mechanical Systems w ithin Conditioned Space 6.3% 6.3% 9 Improved Heat Pump Efficiency (from 13 to 15 SEER and from 7.7 to 8.5 HSPF) 6.7% 6.7%C Dom estic Hot Water Measures13 Solar Domestic Hot Water System (32 sq. ft. collector, 65 gal tank) 7.6% 7.6%14 Solar Domestic Hot Water System (64 sq. ft. collector, 80 gal tank) 9.7% 9.7% D Lighting Measures15 75% Energy Star Permanent CFL or Fluorescent Indoor Lamps 4.3% 4.3%16 100% Energy Star Permanent CFL or Fluorescent Indoor Lamps 8.8% 8.8% Energy E Systems Renew able Pow er Measures SUPPORT TO TEXAS JURISDICTIONS 33 33 Laboratory 2011 Building Officials Association of Texas - Mid Year Meeting17 4 kW Photovoltaic Array 27.1% 27.1%
  34. 34. D Lighting Measures Proposed Energy Efficiency Measures (EEMs)15 75% Energy Star Permanent CFL or Fluorescent Indoor Lamps 4.3% 4.3% 2009 IECC Code-Compliant House with Heat Pump Heating16 100% Energy Star Permanent CFL or Fluorescent Indoor Lamps 8.8% 8.8%E Renew able Pow er Measures17 4 kW Photovoltaic Array 27.1% 27.1%Description of Com bined Measures Annual Energy Savings (%) 1 Com bination of Measures 5 Site Source Com bination 116 100% Energy Star Permanent CFL or Fluorescent Indoor Lamps 7 Decreased Window SHGC & U Value (from .3 to .2 SHGC & from .5 to .3 U-Value) 15.8% 15.8% 1 Radiant Barrier in Attics (w ith Ducts in Attics) Com bination 215 75% Energy Star Permanent CFL or Fluorescent Indoor Lamps 7 Decreased Window SHGC & U Value (from .3 to .2 SHGC & from .5 to .3 U-Value) 15.4% 15.4% 9 Improved Heat Pump Efficiency (from 13 to 15 SEER and from 7.7 to 8.5 HSPF) Com bination 3 8 Relocate Mechanical Systems w ithin Conditioned Space 16.0% 16.0%14 Solar Domestic Hot Water System (64 sq. ft. collector, 80 gal tank)Note:1. Total energy savings from heating, cooling, lighting, equipment and DHW for emissions reductions determination.2. Energy Cost: Electricity = $0.11/kWh Energy SUPPORT TO TEXAS JURISDICTIONS3. Marginal cost = new system cost - original system cost Systems Laboratory 34 Energy 2011 Building Officials Association of Texas - Mid Year Meeting Systems 34 Laboratory4. New system cost = new system cost only
  35. 35. What about the new 2012 IECC?In 2011 ICC published new editions, triggering the SECO review and energy codes update process:  May, 2011: IECC 2012 edition published  July, 2011: IECC 2012 publication available  Dec, 2011: ESL will provide written recommendation to SECO  SECO: Allow 30 day public comment period on new code recommendation  all comments are provided to ESL for a recommendation to SECO.  SECO: SECO will provide ruling in Texas Register Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 35 Laboratory
  36. 36. Thank You!Please visit our website at Esl.tamu.edu for reports and information! Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 36 Laboratory
  37. 37. Contact Information: Cyndi LewisTexas Emission Reduction Plan Manager- ESL Phone: 979-777-3165 Email: cyndim@tamu.edu Energy SUPPORT TO TEXAS JURISDICTIONS Systems 2011 Building Officials Association of Texas - Mid Year Meeting 37 Laboratory

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