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Connecticut Energy CodeFrederick F. WajcsSenior Energy EngineerNortheast Utilities
February 10, 2011
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Current ConnecticutEnergy Code
2006 International Energy Conservation Code (IECC)
with ASHRAE/IESNA Standard 90.1-2004
as reference document
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Next ConnecticutEnergy Code
2009 IECC
With Standard 90.1-2007as reference document
Anticipated implementation: Second half 2011
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Next ConnecticutEnergy CodeRequired for receipt of the American
Recovery and Reinvestment Act (ARRA) funds
ARRA also requires 90% compliance by December 2017• www.energycodes.gov/arra/
compliance_evaluation.stm• On site surveys anticipate participation of
building officials, design professionals, contractors and suppliers
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Compliance ChecklistsCommercial Building Data Collection Checklist
ANSI/ASHRAE/IESNA Standard 90.1-2007
Date: Name of Evaluator(s):
Building Name & Address: Conditioned Floor Area: ft2
Building Contact: Name: Phone: Email:
Compliance Approach: Prescriptive Trade-Off (Section 5.6) Performance (ECB Section 11)
State: Jurisdiction:
Building Use: Office Retail Storage Education Lodging Dining Public Health Residential Other
Project Type: New Construction Addition Renovation Valuation (If Renovation): $
Complies Item Number Plan Review Y N N/A Comments/Notes/Findings
PR1 [4.2.2]1
Plans and/or specifications provide all information with which compliance can be determined for the building envelope and delineate and document where exceptions to the standard are claimed.
PR2 [4.2.2]1
Plans and/or specifications provide all information with which compliance can be determined for the mechanical systems and equipment and delineate and document where exceptions to the standard are claimed.
PR3 [4.2.2]1
Plans and/or specifications provide all information with which compliance can be determined for the service water heating systems and equipment and delineate and document where exceptions to the standard are claimed.
PR4 [4.2.2]1
Plans and/or specifications provide all information with which compliance can be determined for the lighting and electrical systems and equipment and delineate and document where exceptions to the standard are claimed. Information provided should include interior and exterior lighting power calculations, wattage of bulbs and ballasts, transformers and control devices.
PR5 [6.4.2]1
HVAC load calculations submitted.
PR6 [7.4.01]1
Service water heating load calculations submitted.
PR7 [6.7.2.4]1
Detailed instructions for HVAC systems commissioning included on the plans or specifications.
PR8 [6.7.2.1]1
Construction documents require HVAC “as-built” drawings submitted within 90 days of system acceptance.
PR9 [8.4.1.1, 8.4.1.2]1
Feeder and branch circuit load and sizing calculations provided that allow verification of voltage drop.
PR10 [8.7.1 8.7.2]1
Construction documents require as-built drawings for electric power systems and O&M manual for electrical power systems and equipment.
Additional Comments:
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2009 IECC Administration
Applies to residential and commercial buildings
Regulates the design and construction of buildings for the effective use of energy
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2009 IECC Administration
Additions, alterations, renovations or repairs to an existing building, building system or portion thereof shall conform to provisions for new construction
Change in occupancy or use• That increases either fossil fuel or electrical
energy
• Lighting shall comply when space changes from one lighting building area type to another
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Exceptions
Storm windows over existing fenestration and glass only replacement
Cavities completely filled with insulation or not exposed Reroofing
• Roofs without insulation in cavity and where sheathing or insulation is exposed shall comply
Replacement of existing exterior door does not require installation of vestibule as long as existing vestibule is not removed
Alteration that replaces less than 50% of luminaires in a space as long as installed interior lighting power is not increased
Lamp and ballast replacement within existing luminaires as long as installed interior lighting power is not increased
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Commercial Projects Shall Comply
Entirely with Chapter 5Or
Entirely with Standard 90.1-2007
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ConstructionDocumentation Information Insulation material and their R-value Fenestration U-factors and SHGCs Area-weighted U-factor and SHGC calculations Mechanical system design criteria Mechanical and service water heating system and equipment
types, sizes and efficiencies Economizer description Equipment and systems 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
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Envelope
IECC, 90.1Residential and 90.1 Non- Residential Requirements are essentially the same (except skylights) and more stringent than 2006 IECC
90.1 has requirements for semi-heated spaces
Projects with vertical fenestration area (40%) or skylight area (3%) exceeding IECC allowances must use 90.1
IECC has no SHGC requirements for fenestration with projection factor ≥0.25
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Mechanical
Air cooled air conditioner & heat pumps• Efficiency requirements higher than 2006
IECC• 90.1 has IEER requirements for
≥65,000Btu/hWater & evaporatively cooled air
conditioner• Efficiency requirements are mostly the same
as 2006 IECC• 90.1 has IEER requirements
Efficiency requirements for SPVAC and SPVHP in 90.1
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Mechanical
Compliance paths for water chillers• Path A for chillers expected to operate a
significant time near full load conditions• Path B for chillers expected to operate a
significant time at part load conditionsEfficiency requirements for water chillers
• kW/ton for water cooled• Higher full load values but lower part load
values• Air cooled cannot be used for Path B
compliance
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Mechanical
Some boilers have combustion efficiency & thermal efficiency requirements in 2009 IECC
Efficiency requirements for boilers are generally higher in 90.1
Heat rejection equipment requirements are in 90.1 but not in IECC
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Mechanical – Controls
Zone thermostatic controlsOff-hour
• Setback/Shutdown• Optimum start (Systems >10,000 cfm)
only in 90.1• Exceptions for systems:
<6,800 in IECC <15,000 in 90.1
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Mechanical – Controls
Ventilation system• Gravity dampers allowed on outside air
supply & exhaust in buildings <3 stories• Gravity dampers allowed on stair and
elevator shafts in buildings <3 stories in IECC
• Motorized dampers required elsewhere and must have shutoff control
• Ventilation fans Capability to reduce to minimum required in IECC Off-hour shutdown for fans >3/4 hp in 90.1
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Mechanical - Controls
Demand control ventilation for spaces >500 sf & design occupancy >40 persons/ 1,000 sf
Single zone VAV for chilled water AHU ≥5 hp in 90.1
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Mechanical
Duct and pipe insulation requirements are different in IECC and 90.1
Duct sealing requirementsDuct leakage tests
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HVAC Completion Requirements
Record drawings covered in 90.1Operating manualMaintenance manualSystem balancingSystem commissioning for
conditioned area >50,000 sf in 90.1
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Mechanical
Economizers• Air side ≥54,000 Btu/h in IECC
Total capacity without economizers not to exceed 480,000Btu/h or 20% economizer capacity
• Air side ≥135,000 Btu/h in 90.1Fan power limitations in IECC and
90.1Speed control on VAV fan motors
≥10 hp
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Mechanical – Hydronic Systems
Flow modulation (≥300,000 Btu/h for IECC)
Speed control on variable flow systems (>50 hp Pumps in 90.1)
Equipment isolationTemperature reset controlsTwo-way valves on hydronic heat
pumps (>10 total pump system power in IECC)
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Mechanical
Energy recoveryExhaust hoodsRadiant heating systems required
for unenclosed spacesHot gas bypass limitations
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Service Water Heating
Equipment efficienciesPool heatersPipe insulationPool coversHeat trapsAllowed for space heating in 90.1
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Lighting
Building area method lighting power densities in IECC and 90.1
Space-by-space method lighting power densities in 90.1
Meet lighting power densities requirements when replacing ≥50% of luminaires
Exterior lighting power allowances
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Lighting – Controls
Automatic interior lighting shutoff in all spaces • Holiday scheduling included in IECC
Space controls• Bi-level capability in IECC• Automatic controls in defined spaces in 90.1• For each interior enclosed space
Individual independent controls in daylight zones in IECC
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Detailed Comparison
On Connecticut Chapter of ASHRAE web page www.ctashrae.org
Spreadsheet showing requirements in 90.1-2001, 90.1-2004 and 90.1-2007
Spreadsheet showing requirements in 2006 IECC, 2009 IECC and 90.1-2007
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Training
International Code Council training sponsored by State of Connecticut Office of Education and Data Management
To register for :
http://www.iccsafe.org/Education/Courses/Pages/CT-Energy-list.aspx
