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Connecticut Energy Code
Administration, General Requirements and
Mechanical and Service
Water Heating Provisions
of 2009 International Energy Conservation Code
Connecticut Energy Code
 2009 International Energy Conservation Code
(IECC) became effective October 6, 2011
 Reason for adoption


Required by the receipt of ARRA funds
Receipt of ARRA funds also required
achievement of 90% compliance by December
2017. Information available at
www.energycodes.gov/arra/compliance_checklists.stm
2
Administration – Applicability
 New construction
 Additions, alterations, renovations or repairs
to an existing building, building system or
portion thereof
 Change in occupancy that would result in an
increase in energy demand
 Change in space use from one building type
to another building type in the lighting table
 Change in space conditioning
 Mixed occupancy
3
Administration & General Requirements
 Information on construction documents (103.2):
 Mechanical system design criteria
 Mechanical and service water heating system and
equipment types, sizes and efficiencies
 Economizer description
 Equipment and system controls
 Fan motor horsepower (hp) and controls
 Duct sealing, duct and pipe insulation and location
 General requirements
 Connecticut is in climate zone 5A
 Interior design conditions



Maximum of 72° for heating
Minimum of 75° for cooling
Maintenance information
4
Residential – Systems
 Equipment sizing (Mandatory)


Heating and cooling loads calculated in
accordance with ACCA Manual J
(CT Supplement)
Heating and cooling equipment sized in
accordance with ACCA Manual S
(CT Supplement)
5
Residential – Systems
 Controls (Mandatory)


At least 1 thermostat for each separate
heating and cooling system
At least 1 programmable thermostat for
forced- air furnace
(55° to 85° capability, 70° & 78° initial settings)
6
Residential – Systems
 Controls (Mandatory)
 Heat pumps with electric-resistance supplemental
heat controls:
 Limit supplemental heat operation when heat
pump compressor can meet load
 Snow- and ice-melting system controls:
 Automatically shut off system when pavement
temperature >50° and no precipitation is falling,
and
 Automatic or manual shutoff when outdoor
temperature >40°
7
Residential – Systems
 Ducts (Prescriptive)




R-8 minimum insulation on supply ducts in
attics
R-6 minimum insulation on all ducts elsewhere
Minimum duct R-values are installed values
(CT Supplement)
Exception

Insulation not required on ducts located
completely inside building thermal envelope
8
Residential – Envelope
Thermal Envelope
Conditioned
Space
Conditioned
Space
9
Residential – Systems
 Ducts (Mandatory)
 Seal joints and seams on:
 All ducts
 Air handlers
 Filter boxes
 Tightness verification
(Not required if the air handler and all ducts are located
within conditioned space)
 Post construction test
 Rough-in test
 Building framing cavities not used as supply or return
(CT Supplement) ducts
10
Residential – Systems
 Duct tightness verification:

Post construction test



≤8 cfm per 100 ft2 leakage to outdoors or
≤12 cfm per 100 ft2 total leakage
Rough-in test


≤6 cfm per 100 ft2 total leakage of complete
system
≤4 cfm per 100 ft2 total leakage of system without
air handler
11
Residential – Systems
 Mandatory



Systems serving multiple dwelling units shall
comply with the commercial requirements.
Automatic or readily accessible manual switch
on hot water circulating pump when system
not in use.
Automatic or gravity dampers on outdoor air
intake and exhausts to close when the
ventilation system not operating.
12
Residential – Systems
 Pools (Mandatory)




Readily accessible switch to allow shutting off
heater without adjusting thermostat setting
Automatic time switch to turn off and on
heaters and pumps
Automatic ignition on natural gas or liquefied
petroleum (propane) heaters
Pool covers:


Vapor-retardant on heated pools, and
R-12 minimum insulation if pool heated >90°
13
Commercial – General
Commercial building project shall comply with:
 Requirements of Sections 502, 503, 504 and
505 in its entirety or
 Requirements of ANSI/ASHRAE/IESNA
Standard 90.1-2007 with 2008 Supplement
(CT Supplement) in its entirety.
 Exception for projects conforming to Section
506, provided all mandatory sections are
each satisfied.
14
Sample Compliance Documentation
Available at: http://www.aiact.org/about/committees_regulations.php
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Commercial – Mechanical
 Mandatory provisions

Heating and cooling load calculations



In accordance with procedures in
ASHRAE/ACCA Standard 183
Adjusted for reductions from energy recovery
systems
Heating and cooling equipment and systems
capacity shall not exceed calculated loads
16
Commercial – Mechanical
 Mandatory provisions

HVAC equipment performance requirements






Unitary air conditioners and condensing units
Package terminal air conditioners and heat
pumps (new construction units and replacement
units)
Warm air furnaces and unit heaters
Gas- and oil-fired boilers
Condensing units
Water chilling packages (Path A and Path B)
17
Commercial – Mechanical
 Mandatory HVAC system controls:
 Thermostatic control for each zone located in zone
controlled
 Heat pump controls to limit electric-resistance
supplemental heat operation
 Humidity control device for each humidity control
system (where provided)
 Automatic off-hour controls for each zone
 Motorized dampers on outdoor air supply and
exhaust ducts
Exception: Gravity dampers permitted on buildings <3 stories
or intake and exhaust air flows ≤300 cfm
18
Commercial – Mechanical
 Ventilation
 Provided in accordance with mechanical code with
capability to reduce outdoor air supply to minimum
required
 Demand controlled ventilation for:
2
 Spaces >500 ft , and
 With average occupant load 40 people per
1,000 ft2, and
 Served by system with one or more of:
1.
2.
3.
Air-side economizer
Automatic modulating control of outdoor air damper
>3,000 cfm design outdoor airflow
19
Commercial – Mechanical
 Mandatory energy recovery ventilation on fan
systems with:


≥5,000 cfm design supply air quantity, and
Minimum outside air quantity ≥70% design
supply air quantity.
 Energy recovery system shall:


Provide change in enthalpy ≥50% difference
between indoor and return air, and
Permit cooling with outdoor air where required.
20
Commercial – Mechanical
 Mandatory duct and plenum insulation
 ≥R-5 insulation in unconditioned spaces
 ≥R-8 insulation when outside
 ≥R-8 insulation separating duct or plenum from
exterior or unconditioned or exempt spaces
 Mandatory duct and plenum sealing
 All longitudinal and transvers joints, seams and
connections shall be securely fastened and sealed
with welds, gaskets, mastics (adhesives), masticplus-embedded-fabric systems, or tapes installed
per manufacturer’s instructions.
 High pressure duct testing
21
Commercial – Mechanical
 Mandatory minimum pipe insulation on
heating and cooling systems with fluid
temperatures <55° and >105°.
 Mandatory fan system (nameplate or brake)
horsepower limits
 Mandatory radiant heating system outside
building with time limit control
22
Commercial – Mechanical
 Air-side economizers on systems
≥54,000 Btu/h
(total capacity without economizers <480,000
Btu/h per building or 20% of air economizer
capacity, whichever is greater)
 Speed control on VAV fan motors ≥10 hp
 Static pressure reset on systems with direct
digital control of individual zone boxes
23
Commercial – Mechanical
 Hydronic system controls
 Limit reheating and recooling of fluids
 Hydronic part load controls for systems ≥300,000
Btu/h design output
 Automatic isolation of equipment in central plants
with >1 chiller or >1 boiler
 Automatic sequencing of multiple-package boilers
feeding common distribution system
 Single boiler system >500,000 Btu/h input to have
multistaged or modulating burner
 Speed control on heat rejection fans ≥7.5 hp
24
Commercial – Mechanical
 Hydronic (water loop) heat pump systems


≥20° dead band between heat rejection and
heat addition by central devices
Open- or closed-circuit cooling tower:




Separate heat exchanger to isolate tower from
loop
Automatic shutoff of tower loop pump
Automatic valve on tower loop to stop flow
Two-position valve on each heat pump on
system with >10 hp total pump system power
25
Commercial – Mechanical
 Systems serving multiple zones



Variable Air Volume (VAV) systems required
Capability to reduce primary air before reheating, recooling
or mixing
Supply-air temperature reset control
 Heat recovery for service water heating when:



Facility operates 24 hours a day
>6,00,00 Btu/h water-cooled heat rejection
>1,000,000 Btu/h design service water load
 Hot gas bypass limitation on systems without
multiple steps of unloading or continuous capacity
modulation
(50% max on systems ≤240k Btu/h, 25% max on systems >240k Btu/h)
26
Commercial – Mechanical
 Mandatory HVAC system completion

Evidence of completion provided by design
professional


System balancing
Operating manual(s) and maintenance manual(s)
 Equipment capacity and maintenance actions
 System control maintenance and calibration
information
 Control sequence descriptions
 Complete written narrative of how each system is
intended to operate
27
Commercial – Service Water Heating
Mandatory requirements
 Equipment efficiency
 Temperature controls to allow 110° to
dwelling units and 90° to other occupancies
 1” pipe insulation on automatic-circulating
systems
 ½” pipe insulation on first 8 ft. on
noncirculating systems
 Heat traps on supply and discharge piping
28
Commercial – Service Water Heating
 Pools (Mandatory)




Readily accessible switch to allow shutting off
heater without adjusting thermostat setting
Automatic time switch to turn off and on
heaters and pumps
Automatic ignition on natural gas or liquefied
petroleum (propane) heaters
Pool covers:


Vapor-retardant on heated pools, and
R-12 minimum insulation if pool heated >90°
29
Total Building Performance
 Performance-base compliance:



Energy cost of proposed design ≤ energy cost
of standard reference design
Simulations include all building systems and
all internal and process loads
All mandatory criteria are met
 Complete freedom for trade offs

Criteria for components, assemblies and
systems will be different than prescriptive
criteria, especially for mechanical
30
Connecticut Energy Efficiency Fund
Programs for C/I Projects
 Energy Conscious Blueprint
Incentives for new construction and major
renovation
 Energy Opportunities
Incentives for retrofit of existing systems
 Rebates
Rebates or replacement of equipment and
controls
31
CT Energy Efficiency Fund Programs
Presentation by:
The Conservation and Load Management Departments of
Connecticut Light & Power and United Illuminating
32
COMMERCIAL & INDUSTRIAL
PROGRAMS
33
Energy Conscious Blueprint Program
(EB)
 New Construction
 Major Renovation
 Equipment Replacement
 75% End of Life
 Project Track (Incentive requires pre-approval)
 Prescriptive Rebate
Energy Opportunities (EO)
 Encourages customers to replace functioning equipment
with more energy-efficient options
 Project Track (Incentive requires pre-approval)
 Prescriptive Rebate
34
Energy Conscious Blueprint (EB)
Energy Opportunities (EO)
 Incentives for
installing:
HVAC equipment
VFDs
Refrigeration
Motors
Process equipment
Gas boilers
Energy-efficient lighting*
Lighting controls
35
Mechanical Upgrades (EO)
 Incentive is the lesser of:


40% installed cost
The greater of:
CL&P
$0.35/kWh
UI
$0.30/kWh
$1,000/summer peak kW
$800/summer peak kW
36
Energy Conscious Blueprint (ECB)
HVAC
Unitary/splits/ductless units (≤ 30 Tons) $50 to $120 / ton
Unitary/splits/ductless units (>30 Tons)
Custom
Chillers & VFDs
Custom
Air Compressors (lesser of)
Incremental Cost
75%
Measure Cap (greater of)
$0.30 / kWh OR
$1,000 / summer peak kW
Prescriptive VFD’s 0 – 5 hp
$0
≥ 5 hp < 40 hp
$310 / hp
≥ 40 hp > 50 hp
$240 / hp
≥ 50 hp ≤ 100 hp
$205 / hp
> 100 hp
See Process Equipment
37
Gas Measures – Retrofit (EO)
Space Heating and Non-Space
Heating (lesser of)
EO
RCx / O&M
% of Installed Cost
40%
40%
Measure Cap
$3.50/ccf
$3.50/ccf
Prescriptive Values – if applicable $$/unit
$$/unit
Gas Food Service Rebates
EO and ECB
ENERGY STAR® Gas Fryers
$750/unit
ENERGY STAR Gas Steamers
$750/unit
ENERGY STAR Gas Convection Ovens
$500/unit
ENERGY STAR Gas Griddles
$450/unit
39
Gas Measures – Other
Other Prescriptive Caps
EO
Pool Covers (automated)
$12.00/sf
Window Film
$2.00/sf
EMS Systems
$500/pt
ECB
$500/pt
High Performance Glazing
$2.00/sf
Gas Boilers (non-condensing)
$4.00/input MBH
Gas Boilers (condensing)
$8.00/input MBH
Gas Storage Water Heaters
Varies by input MBH
Gas IR Heater Fixed Rebates (Low & High Intensity)
Varies by input BTU
Up to 50,000 BTU/hr
$500/unit
≥ 50,000 BTU/hr < 150,000 BTU/hr
$550/unit
≥ 150,000 BTU/hr < 175,000 BTU/hr
$650/unit
≥ 175,000 BTU/hr
$850/unit
41
HVAC – Cool Choice Rebate
 $ per ton for exceeding code

Unitary / splits / ductless units (units ≤ 30 tons)


$50 - $120 / ton (see rebate)
Unitary / splits / ductless units (> 30 tons)

Custom Incentives

Chillers & VFDs

Rooftop Units
42
43
44
C&I Loan Program
4.99% for all single measure projects




Through 3rd party lenders
Loan limits: $2,000 to $1M with interest
subsidies on the first $100,000
Maximum loan term not to exceed 5 years
Potential cash positive scenarios created
2.99% For projects addressing multiple
measures and two or more end uses
45
RESIDENTIAL PROGRAMS
46
Rebates for ENERGY STAR®
Certified Equipment
HVAC
$150 to
$250/
system
Electric
Central A/C
Electric
Heat Pump
Systems
Ductless
Split Heat
Pump
Geothermal
Heat Pump
$500/ton
$250/unit
$1,500/
dwelling
$1,000/
dwelling
Additional information on these and
all Energy Efficiency Fund rebates
can be found at:
www.CTEnergyInfo.com
47
Residential New Construction
Program
Incentives Available for Building Energy Efficient Homes!
Single Family Homes, Multifamily Homes, and Gut Rehabs of
Existing Homes Qualify
For more information contact:
Michael Chesney
UIL Holdings Corporation
180 Marsh Hill Road MS AD-2A
Orange, CT 06477
Enoch Lenge
CL&P/Yankee Gas
107 Selden St.
Berlin, CT 06037
Tel:
860.665.5369
Tel:
203.499.5935
Fax:
860.665.3030
Fax:
203.499.2800
Email: Michael.Chesney@uinet.com Email: Enoch.Lenge@nu.com
48
Contacts
United Illuminating
•
•
•
•
•
Commercial Programs:
Residential Programs:
Natural Gas Programs:
Rebates:
Financing:
Roy W. Haller (203) 499-2025
Chris Ehlert (203) 499-2965
Roy W. Haller (203) 499-2025
Roy W. Haller (203) 499-2025
Roy W. Haller (203) 499-2025
Connecticut Light & Power
• Commercial Programs:
•
•
•
•
Residential Programs:
Commercial Rebates:
Natural Gas Programs:
Financing:
Rich Asselin (860) 665-3292
Glen Eigo (860) 665-5084
Lomont White (860) 665-3790
Dave Hayward (860) 665-3386
Matt Fox (860) 665-3749
Gentiana Darragjati (860) 665-4757
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Questions?
Thank you!
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