Connecticut
Energy Code
Frederick F. Wajcs
Senior Energy Engineer
Northeast Utilities
February 10, 2011
Brought to you by:
Current Connecticut
Energy Code
2006 International Energy
Conservation Code (IECC)
with ASHRAE/IESNA
Standard 90.1-2004
as reference document
2
Next Connecticut
Energy Code
2009 IECC
With Standard 90.1-2007
as reference document
Anticipated implementation:
Second half 2011
3
Next Connecticut
Energy Code
Required for receipt of the American
Recovery and Reinvestment Act (ARRA)
funds
ARRA also requires 90% compliance by
December 2017
• www.energycodes.gov/arra/compliance_eval
uation.stm
• On site surveys anticipate participation of
building officials, design professionals,
contractors and suppliers
4
Compliance Checklists
Commercial Building Data Collection Checklist
ANSI/ASHRAE/IESNA Standard 90.1-2007
Date:
Name of Evaluator(s):
Building Name & Address:
Conditioned Floor Area:
Building Contact: Name:
Compliance Approach:
State:
Phone:
Prescriptive
Trade-Off (Section 5.6)
ft
2
Email:
Performance (ECB Section 11)
Jurisdiction:
Building Use:
Project Type:
Office
Retail
Storage
New Construction
Education
Lodging
Addition
Dining
Renovation
Public
Health
Residential
Other
Valuation (If Renovation): $
Complies
Item
Number
Plan Review
PR1
1
[4.2.2]
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
1
[4.2.2]
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
1
[4.2.2]
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
1
[4.2.2]
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
1
[6.4.2]
HVAC load calculations submitted.
PR6
1
[7.4.01]
Service water heating load calculations submitted.
PR7
1
[6.7.2.4]
Detailed instructions for HVAC systems commissioning
included on the plans or specifications.
PR8
1
[6.7.2.1]
Construction documents require HVAC “as-built” drawings
submitted within 90 days of system acceptance.
PR9
[8.4.1.1,
1
8.4.1.2]
Feeder and branch circuit load and sizing calculations
provided that allow verification of voltage drop.
PR10
[8.7.1
1
8.7.2]
Construction documents require as-built drawings for
electric power systems and O&M manual for electrical
power systems and equipment.
Additional Comments:
Y
N
N/A
Comments/Notes/Findings
5
2009 IECC Administration
Applies to residential and
commercial buildings
Regulates the design and
construction of buildings for the
effective use of energy
6
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
7
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
8
Commercial Projects Shall
Comply
Entirely with Chapter 5
Or
Entirely with Standard 90.1-2007
9
Construction
Documentation 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
10
Envelope
IECC, 90.1Residential and 90.1 NonResidential 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
11
Mechanical
Air cooled air conditioner & heat pumps
• Efficiency requirements higher than 2006
IECC
• 90.1 has IEER requirements for
≥65,000Btu/h
Water & 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
12
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 conditions
Efficiency 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
13
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
14
Mechanical – Controls
Zone thermostatic controls
Off-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
15
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
16
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
17
Mechanical
Duct and pipe insulation
requirements are different in IECC
and 90.1
Duct sealing requirements
Duct leakage tests
18
HVAC Completion
Requirements
Record drawings covered in 90.1
Operating manual
Maintenance manual
System balancing
System commissioning for
conditioned area >50,000 sf in 90.1
19
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 90.1
Fan power limitations in IECC and
90.1
Speed control on VAV fan motors
≥10 hp
20
Mechanical – Hydronic
Systems
Flow modulation (≥300,000 Btu/h
for IECC)
Speed control on variable flow
systems (>50 hp Pumps in 90.1)
Equipment isolation
Temperature reset controls
Two-way valves on hydronic heat
pumps (>10 total pump system
power in IECC)
21
Mechanical
Energy recovery
Exhaust hoods
Radiant heating systems required
for unenclosed spaces
Hot gas bypass limitations
22
Service Water Heating
Equipment efficiencies
Pool heaters
Pipe insulation
Pool covers
Heat traps
Allowed for space heating in 90.1
23
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
24
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
25
Detailed Comparison
On Connecticut Chapter of ASHRAE
web page www.ctashrae.org
Spreadsheet showing requirements
in 90.1-2001, 90.1-2004 and 90.12007
Spreadsheet showing requirements
in 2006 IECC, 2009 IECC and 90.12007
26
Training
International Code Council training
sponsored by State of Connecticut
Office of Education and Data
Management
To register for :
http://www.iccsafe.org/Education/C
ourses/Pages/CT-Energy-list.aspx
27
Thank You!
Fred Wajcs
Senior Energy Engineer
Conservation and Load Management
860-665-3286
wajcsff@nu.com
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