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2018 Illinois Energy CodeWhat Might We Expect from CDB ECAC?
2018 IECC (90.1-16) effective March 22nd, 2019
1
www.ieccode.com
https://smartenergy.illinois.edu/energy-code
-or-
www.epa.illinois.gov/topics/energy/index
-or-
www.ildceo.net/energycode
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3
Energy Code Advisory Council
Timeline to adopt/amend 2018 IECC
Sept 22, 2017 – 2018 IECC available to public
Dec 2017 – ECAC independent, preliminary review
Jan 1, 2018 – Solicitation for amendments opens
Feb – Apr, 2018 – Subcommittee meetings
Mar 31, 2018 – Solicitation period closes
May 2018 – ECAC Review
Residential Subcommittee done
Commercial Subcommittee still at work
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Energy Code Advisory Council
Timeline to adopt/amend 2018 IECC
Jun 2018 – Council votes amendments/submit to CDB
Aug 2018 – CDB votes on adoption/submit to Governor
Sept 2018 – ECAC Review/Approve of any CDB action
Oct 2018 – JCAR process begins
Nov 2018 – ECAC/CDB Staff review JCAR comments
Feb 2019 – Final rules to ECAC/CDB Staff
Mar 1, 2019! – 2018 IECC (90.1-2016) effective
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Energy Code Advisory Council
Commercial Proposals
Chicago Roofing Contractors Association
Clarifications - Reroofing
Clarifications - Roof Peel
New Buildings Institute
R-1/R-2 lighting efficacy improvements
U-factor harmonization w/ ASHRAE 90.1-16
R-1/R-2 DHW at least 40% of total water-heating load from
renewable or recovered sources
Exit access means of egress lighting < 0.02 w/ft2 or be
occupancy sensor-controlled
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Whole-Building Percent Savings
90.1-2013 vs. 2015 IECC
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Model Codes Historic Savings
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IECC-R2018
IECC-C2018
ASHRAE90.1-2016
6.7%2.0%
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Whole-Building Percent Savings
90.1-2013 vs. 90.1-2016
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Whole-Building Savings in Illinois
90.1-2013 vs. 90.1-2016
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Summary of Code & Std Submittals 2015 IECC to 2018 IECC
90.1-2013 to 90.1-2016
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OVERVIEW
PROVISIONS
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§C402.1.3
Prescriptive
R-value
Method(No tradeoffs)
§C402.1.4
§C402.1.5
Prescriptive
U-factor
Performance(Tradeoffs btwn
components)
§C407
Total Building
Performance
(Annual energy cost < 85% of
reference design)
§401.2, No.1
ASHRAE 90.1
(Compliance alternative)
14
§5.5
Prescriptive
R-value
Method(No tradeoffs)
§5.6
U-factor
Trade-off
Option(Tradeoffs btwn
components)
§6.3, §6.4
Simple or
Prescriptive
Mechanical(≤ Two stories,
<25,000 ft2, Simple HVAC)
§11
ECB
(Annual energy cost comparison)
Appendix ‘G’
Performance Rating Method
ASHRAE 90.1-2016 “Appendix G” is a compliance path.
ASHRAE 90.1-2016
Appendix ‘G’ … What does that mean? LEED v.4 [Minimum] Requirements
Option 1. Whole-building energy
simulation
Demonstrate an improvement of 5% for new
construction, in the proposed building
performance rating compared with the
baseline building performance rating.
Calculate the baseline building performance
according to ASHRAE 90.1–2010, Appendix G,
with errata (or a USGBC-approved equivalent
standard for projects outside the U.S.), using a
simulation model.
Option 2. Prescriptive compliance: ASHRAE
50% Advanced Energy Design Guide
Comply with mandatory and prescriptive provisions
of ASHRAE 90.1–2010, w/ errata.
Comply with the HVAC and service water heating
requirements, including equipment efficiency,
economizers, ventilation, and ducts and dampers, in
Chapter 4, Design Strategies and Recommendations
by Climate Zone, for ASHRAE 50% Advanced Energy
Design Guide:
ASHRAE 50% AEDG for Small to Medium Office
Buildings (< 100,000 ft2);
ASHRAE 50% AEDG for Medium to Large Box Retail
Buildings (> 20,000 to 100,000 ft2);
ASHRAE 50% AEDG for K–12 School Buildings; or
ASHRAE 50% AEDG for Large Hospitals
(> 100,000 square feet)
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2018 IECC COMMERCIAL NEW Stuff!
+4% improvement in Site EUI
Increased allowable skylight area when daylighting;
Modest SHGC reductions Zones 4-5 match ASHRAE 90.1-16;
U-factors stay same; ASHRAE 90.1-16 more stringent
All IECC designs must implement one efficiency measure:• Install HVAC equipment +10% higher efficiency than IECC;
• Install lighting system -10% less LPD than IECC;
• Install “enhanced” digital lighting controls (cont. dimming, digitally addressable);
• Design for on-site renewable energy at least 0.5 W/ft2;
• Install DOAS (Dedicated Outdoor Air System) with 100% OA Energy Recovery;
• Solar SWH or SWH with waste-heat recovery, or process CHP each w/ min 60% recovery;
• New! Enhanced envelope insulation values (-15% improvement to Total UA); or
• New! Reduced air infiltration (0.25 cfm/ ft2 vs 0.40 cfm/ ft2 at 75 Pa).
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2018 IECC COMMERCIAL NEW Stuff!
Buildings ≤ 30% WWR can TRADE-OFF daylight controls
where LPD’s are -40% less than code;
Reduced Lighting Power Allowances – interior, exterior and
retail display;
Total voltage drop in feeder and branch circuits (<5%)
Section 4 (MECH) completely reorganized;
Conditioned vestibules shall be equipped with controls
Various minor mechanical corrections & improvements.
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+6% improvement in Site EUI in Illinois
Major formatting change for “ease of use”;
Climate Zone re-Mapping (ref. to ASHRAE 169-2016);
LEED – Appendix ‘G’ now accepted path to compliance;
U-factors/SHGC’s reduced by 22% and 12%, respectively;
Whole building air leakage testing added as an alternative;
Air barrier Cx (Commissioning) added as “installation & verification”;
90.1-2016 COMMERCIALNew Stuff!
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Mechanical equipment replacement now subject to (controls,
economizer, fan efficiency, compressor staging, boiler turndown provisions);
HVAC controls for hotel/motel guest rooms improved;
Reduced Lighting Power Allowances – interior, exterior
and retail display;
Interior space-by-space reduced an avg. of -26%
Exterior lighting reduced an avg. of -30%
Retail display reduced an avg. of -25%
Exterior lighting on occupancy sensing reduce -50%.
90.1-2016 COMMERCIALNew Stuff!
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ASHRAE 90.1 New Print Format
90.1-2013, 278 pages
Dual-column format
No shading table rows
Definitions normal font
90.1-2016, 388 pages
Single-column format
Shaded table rows
Definitions italicized
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ASHRAE 90.1-2016 OnlyNew Climate Zones in accordance w/ ASHRAE 169-2014
Approximately 10% of U.S. Counties
reassigned to a warmer climate zone.
Energy use increases+0.18% country-wide
due to less stringent insulation levels.22
2018 IECC C402.4.1Daylight responsive controls, TRADE OFF
Daylight-responsive controls are required for buildings where:
WWR ≤ 30% and Skylights ≤ 3% and space has ≥ 150W primary side-lit area;
C405.2.3 UNLESS! The building CLP is -40% less than the code-required ICLPB
30% < WWR ≤ 40% and ≤ 2 stories, a min. of 50% of floor area in daylight zone;
30% < WWR ≤ 40% and > 3 stories, a min. of 25% of floor area in daylight zone;
3% < Skylight Area ≤ 6% provided daylight controls are installed in toplit zones.
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Defining SIDE-LIGHTED area
2015 IECC & 2018 IECC
128 w < 150 w
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Defining SIDE-LIGHTED area
ASHRAE 90.1-2013 & 90.1-2016
192 w > 150 w
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C402.4.2 – Minimum Skylight Area
§5.5.4.2.3 – Minimum Skylight Area
In certain spaces: (offices, lobbies, atria, concourses, corridors, storage
spaces, gymnasium/exercise centers, convention centers, courtrooms,
automotive service, fire station apparatus, manufacturing, non-
refrigerated warehouses, retail stores, library reading and stacks,
distribution/sorting areas, transportation depot and seating and
workshops)
Where ≥ 2,500 ft2; and
Directly under roof w/ ceiling heights ≥ 15 ft.;
Total top-lighted area under skylights shall be at least 50% of floor area
Min. skylight area to top-lighted area ratio > 0.03 w/ VT > 0.40
Min. skylight effective aperture > 1.0
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ELECTRICAL
LIGHTING & POWER
PROVISIONS
27
ASHRAE 90.1-2013/16 ONLY
§8.4.2 – Automatic Receptacle Control
50% of all 125 volt, 15- and 20-amp receptacles
automatic-OFF when not occupied, in:
Private offices
Classrooms
Conference rooms
New! Individual workstations
New! Lunch/break rooms
New! Print/copy rooms
New! 25% of receptacles for modular furniture
Plug-in devices shall not be used to comply w/ 8.4.2
Exceptions:
Receptacles designated for 24-hr equipment operation
Spaces where such control would endanger occupant safety or security
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Lighting
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C405.5.1 – Exterior Lighting Zones§9.4.2 – Exterior Lighting Zones
3030
MECHANICAL & SWH
PROVISIONS
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2018 IECC COMMERCIALNEW Stuff!
All IECC designs must implement an additional efficiency measure;
Vestibule, Air-curtain exception;
HW boiler OATdb setback control (large office, school, hospital, large hotel)
Reduces system size/OA air thresholds where ERV required (± 8,000 hrs?)
DX cooling economizer threshold upped to 54,000 Btuh (DX capacity limits)
Economizer Fault Detection Diagnostic (FDD) controls same as 2015 IECC
Multi-speed or variable speed fans for DX Cooling > 65,000 Btuh
Modification to kitchen exhaust/make-up air
For Compensating Hoods (no more than 10% replacement air)
Limitations on maximum rate of supply air delivered to the kitchen
Air systems w/ Total Fan HP > 5, subject to fan power calculation
Fans > 5 HP to have fan efficiency grade (FEG) > 67 (via AMCA 205)
Commercial cased/open refrigeration energy conservation measures
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90.1-2016NEW Stuff!
No Additional efficiency measures. IECC requires for New! buildings
No Vestibule air-curtain exception; New! Vestibule T-Stat control!
HW boiler OATdb setback control (large office, school, hospital, large hotel)
Reduces system size/OA air thresholds where ERV required (± 8,000 hrs?)
Clarity to static pressure sensor location and EMS setpoint reset
DDC control required for three (3) common building situations
Fractional horsepower motors ≥ 1/12 hp to be ECM (boxes and FCU’s)
New! Economizer Fault Detection and Diagnostic (FDD) control
Multi-speed or variable speed fans for DX Cooling > 65,000 Btuh
Air systems w/ Total Fan HP > 5, subject to fan power limitation calculation
Fans > 5 HP to have fan efficiency grade (FEG) > 67 in accordance AMCA 205
Commercial cased/open refrigeration energy conservation measures
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Provisions Applicable to ALL Mechanical Systems
Loads to ASHRAE/ACCA 183
Equipment sizing (140%, 115%)
HVAC equipment efficiency
System controls:
Off-hour setback, shutdown
Optimal start
Economizer fault detection
HW Boiler OAT dB setback
Demand Controlled Ventilation
Enclosed parking structures
Energy recovery ventilation
Max net Kitchen exhaust MUA
limitations (<10% for comp hoods)
Duct insulation/sealing (R-8 or R-12)
Piping insulation
Air system design/control
Fans > 5 hp must have FEG > 67
Heating outside building
Refrigeration equipment efficiency
Refrigerated warehouse/cooler-
freezer
Commissioning (Cx) where ≥ 40
tons cooling or ≥ 600 KBtuh
heating/SHW
Commissioning plan developed by
a registered design professional
C403.2 – Mandatory Provisions
§6.4 – Mandatory Provisions
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Dampers are a key component in
controlling air intake, exhaust & leakage.
Economizers employ dampers to
deliberately separate air streams of
different temperature.
When dampers do not close properly, or
contain gaps, they leak air instead of
separating it; the temperature
difference, and therefore the energy
benefit is degraded
Dampers and air economizers shall
be equipped with Class 1 AMCA
Performance Rated, “Ultra Low-
Leakage” dampers.
C403.2.4.3 – Ultra-Low-Leak,
FDD-Equipped Economizers
Reporting faults accessible to “day-to-day” operating personnel or service staff
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DX Cooling Staging Modulating Units2015 IECC C403.3.1 (Mandatory)
2018 IECC C403.5.1 (Mandatory)
90.1-2013 §6.5.1.4 (Mandatory)
90.1-2016 §6.5.1.3 (Mandatory)
36
What is VRF?
Simultaneous Cooling AND Heating
Cooling or Heating
Cooling
Mode
Heating
ModeHeat Pump
Heat Recovery
• In NEW buildings ≥ 25,000 ft2
• Devices installed to monitor:
a. Total electric energy
b. HVAC systems
c. Interior lighting
d. Exterior lighting
e. Receptacle circuits
• In buildings w/ tenants, monitoring shall include building, and
each individual tenant (excluding shared systems).
• Data of electrical consumption recorded 15 min. intervals and
reported/made available to tenants for up to 36 months.
ASHRAE Only
8.4.3.1 – Sub-metering
8.4.3.2 – Recording & reporting
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Measure and record Natural gas, Fuel oil, Propane, Steam,
Chilled water, Hot water consumption.
ASHRAE Only
10.4.5 – building energy monitoring
Buildings and additions > 25,000 ft2
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2015 IECC Only
Building Commissioning (Cx)If aggregate ≥ 40 tons cooling or ≥ 600 KBtuh heating
A quality-oriented process that verifies and documents that the selected
building systems have been designed, installed, and function according
to the owner’s project requirements, the basis of design and the
construction documents, and to minimum code requirements.
Heating systems
Cooling systems
Exhaust systems
Control systems
Domestic water systems
Pumping systems
Lighting/lighting control systems
Other energy using systems
Envelope
40
What the Standard says … ASHRAE 90.1-2016 Mechanical Systems Cx Requirement
Section 6.7.2.4 –Systems Commissioning. HVAC control systems shall be tested to ensure that control elements are calibrated, adjusted, and in proper working condition. For projects larger than 50,000 ft2 in conditioned area, except warehouses and semi-heated spaces, detailed instructions for commissioning HVAC systems (see Informative Appendix E) shall be provided by the designer in plans and specifications.
2015 IECC Systems Commissioning Requirement
Section C408.2 -Mechanical Systems & Service Water-heating Systems. Prior to the final mechanical and plumbing inspections, the registered design professional or approved agency shall provide evidence of mechanical systems commissioning and completion.
Construction document notes shall clearly indicate provisions for commissioning and completion requirements in accordance with this section and are permitted to refer to specifications for further requirements.
41
What the Code says …
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