2018 Illinois Energy Code...ASHRAE 90.1 New Print Format 90.1-2013, 278 pages Dual-column format No...

2018 Illinois Energy CodeWhat Might We Expect from CDB ECAC?

2018 IECC (90.1-16) effective March 22nd, 2019

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www.ieccode.com

http://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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https://smartenergy.illinois.edu/energy-code

http://www.epa.illinois.gov/topics/energy/index

http://www.ildceo.net/energycode

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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

4International Energy Conservation Consultants | (708) 790-4602 |www.ieccode.com

Attribution for slide content and intellectual property in existing materials by IECC_LLC.


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




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



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%



Whole-Building Percent Savings

90.1-2013 vs. 90.1-2016



Whole-Building Savings in Illinois

90.1-2013 vs. 90.1-2016



Summary of Code & Std Submittals 2015 IECC to 2018 IECC

90.1-2013 to 90.1-2016



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)

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§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)



https://leeduser.buildinggreen.com/credit/NC-v4/EAp2#ACP-Canada-NECB

https://leeduser.buildinggreen.com/

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).



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.



+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!



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!



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



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.



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



ELECTRICAL

LIGHTING & POWER

PROVISIONS

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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



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

International Energy Conservation Consultants | (708) 790-4602 |www.ieccode.comAttribution for slide content and intellectual property in existing materials by IECC_LLC.

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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)

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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.

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What the Code says …


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