ASHRAE/IESNA 90.1

The Big Picture

Presenter• Jeffrey G. Boldt, PE, LEED® AP

– Principal – KJWW Engineering– Member SSPC-90.1 Mechanical Committee

• Chair – Healthcare and Hydronic Working Groups

– Wisconsin Energy Conservation Code Council– WHEA Code Committee– Past President – Madison Chapter of ASHRAE– ASHRAE International Technology Award– Advanced Energy Design Guide - Healthcare– Ironman Canada

– 9:57 total – 3:28 marathon – Boston qualifier

Learning Goals

• Scope & History of 90.1

• Politics

• Who Decides the Content?

• How Can You Influence 90.1?

• What Will Change in 2007?

• Hints for 2010

Not Covered

• Details of what is in 90.1

• Design information

• This is a BIG PICTURE discussion– Only a few technical items

ANSI/ASHRAE/IESNA Standard 90.1-2004

Scope

• ASHRAE/IESNA 90.1 – 2004(7) Energy Conservation Code for Buildings, Except Low-rise Residential Buildings– Envelope– HVAC– Service Water Heating– Power & Lighting

History – 1

• 1989 – Not code language. Contained requirements and design guidance.

• 1999 – Complete rewrite. Code language for adoption by AHJ

• 2001 –Incorporated 34 addenda published since 1999 edition issued.

History - 2

Issue 1989 1999+

Criteria Professional Judgment

LCC

Tradeoffs Equal Energy Consumption

Equally Cost Effective (LCC)

ASHRAE Standard 90.1 Relative Stringency

0

0.2

0.4

0.6

0.8

1

1.2

Envelope Mechanical Lighting

Building Technology

Rel

ativ

e S

trin

gen

cy

1999

1989

2004 Changes

• Lighting W/SF average 70% of 2001

• Some enthalpy recovery required

• Fan power limits adjusted

• Reheat limits clarified

• Condenser heat recovery for hospitals

• Waterside economizers for humidified buildings???

Politics

• DOE

• ICC

• States

DOE Involvement• EPAct 1992 - DOE mandated that all states have

energy codes substantially equal to ASHRAE 90.1• The Energy Conservation and Production Act

provides that whenever the ANSI/ASHRAE/ IESNA Standard 90.1-1989, or any successor to that code is revised, the Secretary of Energy (Secretary) must determine whether the revised code would improve energy efficiency in commercial buildings. 42 U.S.C. 6833(b)(2)(A).

• The quantitative analysis concluded that the1999 revision of the code would likely reduce the source energy consumption of new commercial buildings by approximately 5.9 percent. Site energy savings were estimated to be approximately 3.9 percent.

DOE Involvement - 2• DOE did not endorse 90.1-2001. DOE ruled that it did

not conserve more energy. • 2004 and 2007 are expected to have positive rulings• DOE challenged ASHRAE to make the 90.1-2010

use 30% less energy than 90.1-2004• One or more bills have been proposed to Congress

to allow DOE to supersede IECC in mandating energy codes.

9/5/2007

Ross Montgomery (SPLS)Rita Harrold (IESNA)John Hogan (TC 4.5)Paul Lindahl (TC 8.6)Ken Luther (TC 6.1)Cedric Trueman (TC 7.6)Martha VanGeem (CIS)Richard Watson (TC 6.5)

Steve Ferguson (ASHRAE)

Liaisons

Ross Montgomery, SPLSRita Harrold, IESNAMartha VanGeem, CISSteve Ferguson, ASHRAE

EXCOM Courtesy

Mick Schwedler, Vice-Chair - PCVMAllan Fraser (Chair Envelope) - PCVMJim Garrigus (Chair Format & Compliance) - PCVMJason Glazer (Chair ECB) - PCVMRon Jarnagin - ConsultantDrake Erbe (Chair Mechanical) - PCVMMerle McBride - ConsultantEric Richman (Chair Lighting) - PCVMLarry Spielvogel - Consultant

Jerry White* - PCVM

EXCOMSubcommittee

William Bahnfleth - PCVMDonald Brundage - PCVMJason Glazer * - PCVM

Itzhak Maor - PCVM

Michael Rosenberg - PCVM

ECBSubcommittee

Wagdy Anis – PCVMKen Brendan (OM – AAMA) – PCVM

(Dean Lewis – Alt OM)Charles Cottrell (OM-NAIMA) – PCVM

(Merle McBride – Alt OM)Craig Drumheller – PSVMAllan Fraser (OM – NFPA) * - PCVMJohn Hogan – PCVMRonald Majette – PCVMJohn Montgomery – PCVMLeonard Sciarra – PCVMBipin Shah – PCVMSteve Skalko (OM – PCA) – PCVM

(Martha VanGeem – Alt OM)Maria Spinu - PCVM

ENVELOPESubcommittee

William Holy (OM-BOMA) - PCVM(Ernest Conrad - Alt. OM)

David Weitz - PCVM

FORMAT & COMPLIANCESubcommittee

Peter Baselici - PCVMDon Beaty - PCVMRoy Crane - PCVMPekka Hakkarainen - PCVMRichard Heinisch - PCVMHyman Kaplan (OM - IALD) -PCVM(Samantha LaFleur - Alt OM)Ronald Kurtz - PCVMMichael Lane - PCVMMichael Mehl - PCVM

Eric Richman * - PCVM

LIGHTINGSubcommittee

MECHANICALSubcommittee

Jerry White, Chair

Jim Calm, Vice-ChairMick Schwedler, Vice-Chair

Notes: • Chair denoted by (*)• OM – Organizational Membership

ASHRAE SSPC 90.1ASHRAE SSPC 90.1

James Garrigus - PCVM*

Jim Calm, Vice-Chair - PCVM

Karim Amrane (OM – ARI ) – PCVM(Michael Woodford – Alt OM)

Anthony Arbore – PSVMDrake Erbe * - PCVMKeith Emerson – PCVMSusanna Hanson – PSVMNed Heminger – PSVMMark Hydeman - PCVMLarry Kouma – PCVMRichard Lord – PCVMKenneth Luther - PCVMHarry Misuriello – PSVMFrank Morrison – PSVMFrank Myers – PCVMSteve Rosenstock (OM EEI) – PCVM

(Charles Foster – Alt OM)David Schaff – PCVMDennis Sczomak – PCVMFrank Stanonik – PCVMJeff Stein – ConsultantCedric Trueman – PCVMMack Wallace – PCVMRichard Watson – PCVMRobin Wilson - PCVM

Chair & Vice-Chairs

Liaisons

• IESNA

• TC 4.5 – Fenestration

• TC 6.1 – Hydronics & Steam

• TC 6.5 – Radiant & Convective

• TC 7.6 – System Energy Use

• TC 8.6 – Towers & Condensers

• SPLS, CIS, ASHRAE

EXCOM Subcommittee

• Chair & Vice-Chairs

• Subcommittee Chairs

• 3 Consultants

ECB Subcommittee

Envelope Subcommittee

Format & Compliance Subcommittee

Lighting Subcommittee

Mechanical Subcommittee

Jeff Boldt, et al. AHRI, EEI + 19

AAMA, NFPA, NAIMA + 85 members BOMA +2 IALD + 9

Membership Levels

• Attend public meetings

• Corresponding Member

• Sub-committee Voting Member– Control proposals that reach FC

• Full Committee Voting Member– Control final document

Committee Activity

• Monthly phone conference

• Summer and Winter ASHRAE Meetings

• 2 annual interim meetings

• Working Groups

• Make proposals or leave committee

• ANSI Process– Respond to ALL proposals and comments

Addenda

• Continuous Maintenance• Public review of all addenda• Proposer responsible• SI versions• Examples

– Radiant panel insulation– Pipe sizing– Calculate pump head

How to Influence 90.1

• Join the list server

• Comment on proposals

• Submit proposals

• Send me suggestions – PLEASE!!

States - Example

• Wisconsin intends to adopt the 2006 International Energy Conservation Code

Why?

• The Wisconsin Energy Conservation Code Council (WECCC), reviewed the 2006 IECC

• I asked to be a member of the WECCC:– To look out for the healthcare industry– To avoid excessive amendments

• We did not recommend many amendments

Why Should I Care?

• The requirements are more strict– The new IECC will save more energy,

especially if you choose the ASHRAE option

• LEED 2.2 requires compliance with ASHRAE 90.1-2004, so in theory meeting the LEED requirements will meet the energy code

90.1-2007

• Incorporates addenda

• Fan HP changes– BHP– Filtration allowances– Lab allowances

• Closing loopholes• Efficiencies up

90.1-2010

• Intended to allow ≤70% of energy use allowed by 90.1-2004

• HVAC & Lighting are main targets

• Ventilation and fan issues dominate HVAC

• Suggestions?????

Learning Goals

• Scope & History of 90.1

• Politics

• Who Decides the Content?

• How Can You Influence 90.1?

• What Will Change in 2007?

• Hints for 2010

Questions?

Complex Systems

• 100% air economizer or water economizer• No reheat, recooling, or mixing in multiple-

zone systems unless:– <30% supply air– <300 cfm, or– Room cfm equals the minimum OA required– Exceptions for pressure relationships & humidity

needs• Unclear whether most hospital areas are exempt

Service Water Heat Recovery (Complex #2)

• Condenser heat recovery required if– 24 hour operation, – > 6 MMBh of cooling heat rejection, and– > 1 MMBh of service water load

• Capacity of 60% of rejected heat or as needed to make 85F service water

• Exception if condenser heat has other uses

Climate

Mandatory ProvisionsMandatory Provisions Prescriptive OptionPrescriptive OptionSection

5.1.4 HVAC LightingSWH HVAC LightingSWH Envelope Envelope

Energy Cost Budget Method

• The ultimate trade-off method allowing you to trade-off across building systems through the use of annual, hourly simulation tools and a baseline building

• The only real way to deal with unique designs, renewables, high-efficiency equipment, etc.

• The basis of the energy portion of the LEED rating

• Limits allowable energy costs of the design to those of a building meeting the Standard

• Buildings must still meet all mandatory requirements (Section X.4)

Mandatory ProvisionsMandatory Provisions Prescriptive OptionPrescriptive OptionSection11 HVAC LightingSWH HVAC LightingSWH Envelope Envelope

Healthcare Impacts

• Why use 90.1-2007?

• Provisions that are difficult to meet– Condenser Water Heating (in IECC also)– Water Economizers (if required - exception

for condenser water heating)– Fan Power Limitations (tough in

healthcare)– Reheat Limitations (also in IECC)

Why Use 90.1-2007?

• It will save more energy

• It is required for LEED® certification

• It requires O&M, record drawings, etc within 90-days of completion

Thank You

Questions?

Steve’s Comments

• Overall – true

• Fan power – series boxes count

• Mandatory – Prescriptive – ECB– Appendix G

• Pump power– Limits are coming

• We can meet 30% - will you complain?