What’s in the New Advanced Energy Design Guide for Small Office Buildings, and How Did We Get There?

Ronald E. JarnaginSP-102 ChairmanPacific Northwest National Laboratoryron.jarnagin@pnl.gov

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What’s In the New AEDG? Document Outline Climate Zones Format of Recommendation Tables Fenestration Recommendations Lighting Recommendations HVAC Equipment and System

Recommendations Example Building Designs How-To Guidance

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AEDG Document Outline

Introduction Integrated design process to achieve

energy savings Recommendations by climate zone

including example building designs How-to guidance for implementing

recommendations

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New Code Climate Map Used

New Code Climate Zone Map Used

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Recommendations by Climate Zone

Energy-saving recommendations for each climate zone contained on single page

Helps achieve energy savings without costly calculations or analysis

Addresses building envelope, lighting, HVAC equipment, systems and service water heating

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Format of RecommendationsClimate Zone 1 Recommendation Table for Opaque Envelope

ItemComponent Recommendation Notes and Details

Roof Insulation Entirely Above Deck R-15 ci EN1-2, 17, 20-21

Metal Building R-19 EN1, 3, 17, 20-21

Attic and Other R-30 EN4, 17-18, 20-21

Single Rafter R-30 EN5, 17, 20-21

Surface reflectance/emittance 0.65 initial/0.86 EN1

Walls Mass No recommendation EN6, 17, 20-21

Metal Building R-13 EN7, 17, 20-21

Steel Framed R-13 EN8, 17, 20-21

Wood Framed and Other R-13 EN9, 17, 20-21

Below Grade Walls No recommendation EN10, 17, 20-21

Floors Mass R-4.2 ci EN11, 17, 20-21

Steel Framed R-19 EN12, 17, 20-21

Wood Framed and Other R-19 EN12, 17, 20-21

Slabs Unheated No recommendation EN13, 17, 19-21

Heated R-7.5 for 12 in. EN14, 17, 19-21

Doors Swinging U-0.70 EN15, 20-21

Non-Swinging U-1.45 EN16, 20-21

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AEDG Recommendations for Fenestration Window-to-wall ratio (WWR) limited to

40% Recommendations on window

orientation Exterior sun control Maximum skylight area of 3%

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AEDG Recommendations for Lighting Lighting power density of 0.9 W/ft2 Source efficiency of 90 mean

lumens/watt Electronic ballasts Daylight controls for WWR >25%

within 12 feet of N/S window wall, 8 feet of skylight edge

Occupancy sensors Minimum surface reflectances

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AEDG Recommendations for HVAC Equipment and Systems Higher efficiency unitary equipment –

varies with climate zone Motorized outside air damper control Economizers needed down to 4.5 tons Demand Controled Ventilation Lower duct friction rate No exterior ductwork

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Example Building Designs

Features examples of advanced building energy designs

Demonstrates flexibility offered in achieving advanced energy savings levels

Selected from award winning designs by architects

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“How-to” Guidance - Envelope

Figure EN-2 Figure EN-3

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“How-to” Guidance - Lighting

Figure EN-4

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How Did We Get There? Meeting Schedule Phases of the Project Peer Reviews Development Challenges/Issues The Results

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SP-102 Meeting Schedule Chairman given a year to complete

project 11 Meetings/conference calls First organizational meeting October

1, 2003 Last conference call to approve

document May ,2004

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Phases of SP-102 Project Groping and sniffing (Toy Store

Exercise) Scoping study to assess potential Bonding Initial drafting and layout Refinement of technical

recommendations Final document preparation and

assessment

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Peer Reviews Peer reviews provided primarily by

committees/individuals from participating organizations

Around 100 reviewers actively participated

Concept review stage (50%) Technical refinement review stage

(80%) Final review stage (100%)

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Committee Chairman’s Sidebar on Schedules Make sure you really understand what

the timeline is for your project (get it down in writing)

Ask for a definition of the key terms, like “what does a year mean?”

Learn to appreciate the wisdom of President Clinton’s famous question in the middle of the Lewinsky affair, “define sex?”

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Development Challenges/Issues Keeping everyone focused through 11

meetings during the year Plug loads – in or out? Keeping criteria on single page Keeping document within page limit Keeping this “simple” Possible problems reaching 30% savings

consistently in all locations Trying to work with very different styles Keeping all constituencies informed

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Did We Do It? You Bet!

Next up in the 30% series are retail and highway lodging

Working on plans for 50% and 70% series guides

Expanded ASHRAE involvement in LEED programs is underway

Guide on sale at 2005 Winter Meeting in Orlando

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Why Should You Care About This?Concerns over energy and sustainability will drive future building decisions.

As an HVAC&R professional you will need the tools to remain competitive and help your clients make informed, cost effective decisions.

This Guide will be one of those tools.

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Now, Surely You Must Have a Question or Two…..