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Connecticut’s New Energy Code Connecticut ASHRAE Tech Session October 13, 2011

Connecticut’s New Energy Code Connecticut ASHRAE Tech Session October 13, 2011. Frederick F. Wajcs, Jr. Senior Energy Engineer Connecticut Light and Power. New Energy Code. 2009 International Energy Conservation Code (IECC) Effective October 7, 2011 2009 International Residential Code (IRC)

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Connecticut’s New Energy Code Connecticut ASHRAE Tech Session October 13, 2011

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  1. Connecticut’s New Energy CodeConnecticut ASHRAE Tech SessionOctober 13, 2011 Frederick F. Wajcs, Jr. Senior Energy Engineer Connecticut Light and Power

  2. New Energy Code 2009 International Energy Conservation Code (IECC) • Effective October 7, 2011 2009 International Residential Code (IRC) • Anticipated in Second Half 2012 201x New State Building Code

  3. Reasons for New Code • Improve the energy efficiency of buildings • Reduce carbon emissions • Requirement for receipt of stimulus funds (including achieving 90% compliance by December 2017) www.energycodes.gov/arra/compliance_checklist.stm

  4. Key Areas • Applicability • Construction document information • Technical requirements • Completion requirements

  5. Applicability • New construction • Additions, alterations, renovations or repairs to an existing building, building system or portions thereof • Change in space occupancy or use that increases energy demand • Change from one lighting use to another • Change in space conditioning

  6. Construction Document InformationSpecifically stated in Section 103.2 (Administration) • Insulation materials and their R-values • Fenestration U-factors & Solar Heat Gain Coefficients (SHGC) • Area-weighted U-factors and SHGC calculations • Mechanical system design criteria • Mechanical and service water heating system and equipment types, sizes and efficiencies • Economizer description • Equipment system and controls • Fan motor horsepower and controls • Duct sealing, duct and pipe insulation and location • Lighting fixture schedule with wattage and control narrative • Air Sealing details

  7. Other Compliance Informationfor Commercial Buildings • Name of code for compliance • Heating and cooling load calculations (max. 72ºF heating, min. 75ºF cooling) • Interior lighting power allowance and connected power • Exterior lighting power allowance and connected power • Details necessary for verifying compliance

  8. Technical Requirements • Mandatory • Prescriptive • Performance • Commercial project must comply with either 2009 IECC in entirety or ASHRAE/IESNA Standard 90.1-2007 in entirety

  9. Commercial Technical RequirementsChapter 5 - Envelope • Vertical fenestration 40% maximum of above grade wall • Skylight 3% maximum of roof area • Insulation and fenestration criteria • Opaque wall insulation R-value or U-factor • IC rated luminaires in thermal envelope and sealed between housing and wall/ceiling covering.

  10. Commercial Technical RequirementsChapter 5 – Envelope Continued • Air Leakage • Window and door assemblies • Curtain wall, storefront glazing and entrance doors • Sealing building envelope • Dampers on air intake and exhaust openings • Loading dock weatherseals • Vestibules • Plenum insulation and sealing

  11. Additional / Different Requirements Under Standard 90.1-2007 • Replacement fenestration needs to comply if >25% of total existing fenestration area • Skylight 5% maximum of roof area

  12. Commercial Technical RequirementsChapter 5 - Mechanical • Calculated heating and cooling loads for equipment sizing • Equipment performance • Air cooled package equipment more efficient • Chiller application & ratings changed • Thermostatic control for each zone • Heat pump control of supplementary electric-resistance heat • Automatic setback, shutdown and shutoff controls • Fan horsepower limitation, hp/cfm

  13. Commercial Technical RequirementsChapter 5 – Mechanical Continued • Duct and plenum insulation and sealing • High pressure duct and plenum leak testing • Pipe insulation • Radiant heating systems for outside building controlled by occupancy sensor or time switch

  14. Commercial Technical RequirementsChapter 5 – Mechanical Continued • Automatic or readily accessible manual switch on service hot water circulating pumps • Snow melt system controls • Readily accessible on-off switch on pool heaters without adjusting set point • Time switched on pool heaters and pumps

  15. Commercial Technical RequirementsChapter 5 – Mechanical Continued • Economizers • Speed control on VAV fans ≥10 hp • Demand control ventilation for spaces >500 sq. ft. and 40 people per 1,000 sq. ft. • Energy recovery on fan systems ≥5,000 cfm and minimum outside air ≥70% of supply air • Automatic supply air temperature reset controls on multi-zone systems

  16. Commercial Technical RequirementsChapter 5 – Mechanical Continued • Isolation of cooling tower on water loop heat pump systems • Two position valves on water loop heat pumps • Pump, boiler and chiller isolation • Automatic speed control on cooling tower fans ≥7.5 hp

  17. Commercial Technical RequirementsChapter 5 – Mechanical Continued • HVAC system completion • System balancing • Operation manuals, complete with written narrative of how each system is intended to operate • Maintenance manuals

  18. Additional / Different Requirements Under Standard 90.1-2007 • Automatic shutdown control for ventilation fans >0.75 hp • Single zone VAV for AHU ≥5 hp • HVAC system commissioning for conditioned area >50,000 sq. ft. • Optimum start controls for systems >10,000 cfm • Speed control on pump motors >50 hp • Efficiency requirements for SPVAC & SPVHP • Duct & pipe insulation requirements

  19. Additional / Different Requirements Under Standard 90.1-2007 • Voltage drop design criteria for conductor sizing • Record power drawing submittal to owner • Complete narrative of how each power system is intended to operate • Power operations manuals and maintenance manuals for each piece requiring maintenance • Calculated service water load

  20. Commercial Technical RequirementsChapter 5 – Service Water heating • Equipment performance • Temperature controls • Heat traps • Pool covers

  21. Commercial Technical RequirementsChapter 5 – Electrical • Each enclosed area to have at least one manual lighting control • Manual control to allow ≥50% reduction in lighting load • Automatic lighting shutoff for buildings ≥5,000 sq. ft. • Daylight zones to have independent controls

  22. Commercial Technical RequirementsChapter 5 – Electrical Continued • Master lighting switch for hotel / motel / boarding housing sleeping units • Automatic exterior lighting control • IC-rated and labeled recessed luminaires in building thermal envelope • All recessed luminaires sealed between housing and wall / ceiling covering • Tandem wiring • Exit signs <5 watts per side

  23. Commercial Technical RequirementsChapter 5 – Electrical Continued • Total connected interior lighting power must be less than the calculated interior lighting power • Total connected exterior lighting power must be less than the calculated exterior lighting power (Separate for tradable and non-tradable surface) • Exterior building grounds luminaires >100 watts must have lamp efficacy >60 l/w

  24. Additional / Different Requirements Under Standard 90.1-2007 • Lighting system replacement in space shall comply with lighting power density • Direct replacement of existing control device shall comply with new control requirement • Automatic lighting control required in defined spaces • Separate control required for defined lighting • Lighting power densities for building types and space types • Base site allowance replaced 5% exterior lighting additional unrestricted allowance (in 2008 supplement). • Record drawing submittals to owner

  25. Completion • Confirm installation is per approved drawings • Provide documentation that required controls are installed • Provide documentation that connected lighting power is less than calculated lighting allowance • Confirm submittals have been provided • Received all required inspections

  26. Additional Information on web • www.ctashreae.org under Technology Transfer • Table of 2006 IECC, 2009 IECC and 90.1-2007 with 2008 supplement requirements • Table of 90.1-2001, 90.1-2004 and 90.1-2007 requirements • www.aiact.org under Building Performance & Regulations Committee • Compliance Documentation Spreadsheets

  27. Connecticut Energy Efficiency Fund • Energy Opportunities program for commercial retrofit • Energy Conscious Blueprint program for commercial new construction and equipment replacement • www.ctenergyinfo.com • 1-877-WISE-USE (1-877-947-3873)

  28. THANK YOU! Questions? Fred Wajcs Conservation and Load Management 860-665-3286 wajcsff@nu.com

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