AFFILIATED ENGINEERS, INC.

2018 Wisconsin Energy Efficiency ExpoHosted by the Wisconsin Association of Energy Engineers

New Wisconsin Energy Code:What it Means for Me?May 17, 2018

Shana Scheiber, PE, LEED AP ID+C, WELL AP

Building Performance Consultant

Affiliated Engineers, Inc.

AFFILIATED ENGINEERS, INC.

Affiliated Engineers, Inc.

AEI’s Vision / Confronting challenges facing society, with insight and innovation.

Offices in theU.S. and U.K. EMPLOYEES16 640

LEED®

PROJECTS

233

STRATEGIC PLANNING + INNOVATION DESIGN + PROVEN PERFORMANCE

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Objectives

• Understand Why Energy Code Exists• USA• Wisconsin

• History Lesson• Awareness of Impacts• Comparison of Old and New Wisconsin Code

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US Energy Consumption by Sector

https://www.eia.gov/totalenergy/data/monthly/#consumption

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US Commercial Sector Energy Consumption By Utility

https://www.eia.gov/totalenergy/data/monthly/#consumption

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Wisconsin Energy Consumption by Sector

Reduce Energy Impact of Buildings• 1,775 Trillion Btu of energy

consumed in Wisconsin annually

• Buildings account for 43% of total energy consumption in Wisconsin

WI Energy Consumption by Sector (2015)Source: https://www.eia.gov/state/print.php?sid=WI

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What Drives Energy Targets and Requirements?

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Current Status of Energy Code Adoption

http://www.energycodes.gov/status-state-energy-code-adoption

As of 5/9/2018

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National Energy Code Development

• 1973: Energy crisis of 1973• 1974: California enacts appliance

efficiency standards• 1975: Energy Conservation and

Production Act (ECPA) • 1987: National Appliance Energy

Conservation Act• 1992: Energy Policy Act of 1992

(EPACT 1992) • 2005: Energy Policy Act of 2005

(EPACT 2005) • 2007: Energy Independence and

Security Act of 2007 (EISA 2007)

• 1975: The first version of ASHRAE 90.1 (90-1975)

• 1989: ASHRAE 90.1-1989• 2004: ASHRAE 90.1-2004• 2007: ASHRAE 90.1-2007• 2010: ASHRAE 90.1-2010• 2013: ASHRAE 90.1-2013• 2014: The first version of ASHRAE

189.1 • 2016: ASHRAE 90.1-2016

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Wisconsin Commercial Energy Code DevelopmentEffective Milestones

• Jul 1, 1978: Department of Commerce (COMM) Chapter 63, regulates multi-family & commercial

• Jul 1, 2002: 2000 IECC with WI amendments

• Mar 1, 2008: 2006 I-codes for commercial buildings with WI amendments

• Sep 1, 2011: 2009 IECC adopted, COMcheck acceptable

• May 1, 2018: 2015 IECC adopted, COMcheck acceptable

• April, 2018: Wisconsin Amendments to 2015 IECC adopted

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Estimated Energy Impact of Wisconsin Code Update

0

20

40

60

80

100

120

2009 IECC 2012 IECC 2015 IECC

Ener

gy U

se In

tens

ity [k

Btu/

SF/y

r ]Impact of Skipping a Code Cycle

15%32%

15% 20%

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2015-IECC ASHRAE 90.1-2013

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The Path to Energy Code Compliance

Mandatory Requirements

Regulated Building SystemsEnvelopeHVACPowerLightingService Hot Water

Prescriptive Options

Compliance

Energy Model

Both work for IECC and ASHRAE 90.1

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Energy Model Options

2015-IECC ASHRAE 90.1-2013

Energy code compliance performance path

Section C407 Total Building Performance

Chapter 11: Energy Cost Budget Method

Quantifying savings beyond energy code compliance

Appendix G: Performance Rating Method

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Energy Code in Wisconsin

LEED 2009 ASHRAE 90.1-2007 Appendix G

LEED v4 ASHRAE 90.1-2010 Appendix G

Old WI state Code 2009-IECC or ASHRAE 90.1-2007 + WI amendments

Focus on Energy Design Assistance ASHRAE 90.1-2007 Appendix G

New WI State Code 2009-IECC or ASHRAE 90.1-2007 + WI amendments

New Focus on Energy Design Assistance ASHRAE 90.1-2013 Appendix G??

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ASHRAE Climate Zones

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ASHRAE 90.1-2013 Changes

Envelope-Mandatory• Continuous air barrier• air leakage requirements

Envelope-Prescriptive• Envelope improvements• Skylight % of roof • Prioritization of south facing glazing

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ASHRAE 90.1-2013 Changes

HVAC

Optimized VAV system is required!Compliance can not be met by selecting compliant equipment!!!

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ASHRAE 90.1-2013 Changes

HVAC Mandatory• New regulated equipment• Demand control ventilation for more spaces

• required when >=25 people per 1000SF

• Optimized fan controls • DDC requirements and controls• Insulation requirements for

steam, HHW & CHW• Duct sealing requirements

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ASHRAE 90.1-2013 ChangesHVAC Prescriptive

Operating Less than 8000 Hours per Year

Operating Greater than 8000 Hours per Year

Exhaust air energy recovery required for more climate zones and lower airflows

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ASHRAE 90.1-2013 Changes

HVAC Prescriptive continued…• Equipment improvements• New equipment included in standard• Economizers • Controls

• Simultaneous heating/cooling limitations • Reheat DT limits for overhead systems• Supply air temperature reset• Pump speed differential pressure reset• Heat rejection equipment • Auto HVAC shut of when door opens• Fan modulation

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ASHRAE 90.1-2013 Changes

HVAC Prescriptive continued…• Fans

• efficiency improvements• Optimize static pressure sensor (for reset)• ECMs for motors 1/12- 1hp• Fan HP allowance adjustments

• Boiler turndown • Chiller and boiler isolation requirements• Chilled water pipe sizing• Hot gas bypass Limits• Laboratory Exhaust• Kitchen Exhaust

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ASHRAE 90.1-2013 Changes

Service Water Heating-Mandatory• ~0-3% Performance requirement

increases for Water Heating Equipment

Service Water Heating-Prescriptive• High-Capacity (>1 MMBtuh)

Service Water Heating Systems -Minimum thermal efficiency of 90%

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ASHRAE 90.1-2013 Changes

Power Mandatory• Low voltage dry-type

distribution transformers• Automatic receptacle controls • Electrical Energy metering and

documentation requirements

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ASHRAE 90.1-2013 Changes

Mandatory Lighting Requirements• Daylighting• Controls

• Occupancy-based everywhere• Manual-on everywhere• Bilevel • Scheduled shutoffs for most space types

• Exterior lighting • Controls: daylighting & time clock• limits are based on night activity

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ASHRAE 90.1-2013 Changes

Lighting-Prescriptive• ~10-30% LPD reduction (varies by building and space type)

Building Type 2007 2013

Health-care clinic 1.0 0.9

Hospital 1.2 1.05

Hotel 1.0 0.87

Manufacturing 1.3 1.17

Multifamily 0.7 0.51

Office 1.0 0.82

Parking Garage 0.3 0.21

Retail 1.5 1.26

School/University 1.2 0.87

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ASHRAE 90.1-2013 Changes

Other Equipment-Mandatory• Electric motor regulations• Energy Monitoring

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ASHRAE 90.1-2013 Changes

Chapter 11-Energy Cost Budget Method• Service hot water• Unmet load hours • Kitchen exhaust systems • Min flow setpoints• Supply air temp reset• Heat rejection design sophistication • Fan speed controls

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ASHRAE 90.1-2013 Changes

Appendix G – Performance Rating Method• % fenestration based on building area

type• Baseline HVAC systems• Service hot water • Ventilation changes:

• Credit allowed for improved ventilation efficiency

• Penalty for over ventilating• Unmet load hours• Heat recovery per prescriptive• Purchased utility pump power• Min flow setpoints reduced

Building Type Baseline Gross Above-Grade

Wall Area

Health-care outpatient

21%

Hospital 27%

Office ≤ 5000 SF 19%

Office 5000 to 50,000 SF

31%

Office > 50,000 SF 40%

School (primary) 20%

School (secondary & University)

22%

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ASHRAE 90.1 Future

Where do we go from here?

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

110%

2004 2007 2010 2013 2016 2019 2022 2025 2028 2031 2034 2037

Regu

late

d Bu

idlin

g En

ergy

Use

vs A

SHRA

E 90

.1-2

004

Year

ASHRAE 90.1 Building Target

Possible Path to nearly Net Zero Buildings

Equipment Level Limit

MaxTech Limit Full Load Efficiency

Systems Approach &Renewable Energy

Chart is an estimate of possible future regulations to achieve Near Net Zero by 2034 based on studies done by Carrier on technical limits of HVAC equipment

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Final Thoughts

• Design teams to plan for code compliance path early in design

• Many projects will require an energy model for code compliance

• More sustainable technologies will be required to meet code and rating targets

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Shana Scheiber, PE, LEED AP ID+C, WELL AP

Building Performance Consultant

Affiliated Engineers, Inc.

sscheiber@aeieng.com608-441-6670

THANK YOU

QUESTIONS?