AB Core Performance A Clear Path to High Performance Buildings
The Energy Center of Wisconsin is a Registered Provider with the American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
Learning Objectives • Participants will be able to: - Summarize the Advanced Buildings Core Performance structure, content and benefits - Describe the rationale for improved building energy efficiency delivered by Core Performance - Explain the value of a prescriptive standard - Apply the Core Performance program to their projects
Introducing Today’s Program: What, Why, How
Fidelity Bank, Advanced Building Design 2007
What We’re Going to Do Today • Introduce you to an easy-to-use new tool that takes the MODELING out of designing energy efficient buildings: The Advanced Buildings Core Performance Guide • Energy Efficiency Just Got a Whole Lot Easier
What is the Core Performance Guide? o A “how to” document for building professionals that provides a clear, easy to follow, and easy to implement, path to improved energy performance in buildings o Relies on “state of the shelf” technologies and practices that are broadly available in the building industry and have been proven to be cost effective.
Signal Issues Driving Energy Efficiency Concerns
Environmental Impact of Commercial and Residential Buildings
71% of total U.S. electricity consumption 40% of total U.S. primary energy 39% of total U.S. CO2 emissions
30% of all raw material 30% of the waste stream 12% of water use
Buildings and Global Warming
1. Reduce fossil fuel use in new buildings by 50% by 2010 2. Reduce fossil fuel use by 50% in an equal amount of renovated buildings by 2010 3. Reduce the target by an additional 10% every 5 years
Easy Cost Effective Path to Efficiency • AB Core Performance provides a guided path to achieving energy performance that is 2030% above the performance called for in ASHRAE 90.1-2004 ― ― ―
Possible utility incentives. A detailed, step-by-step process The process is just like meeting an energy code – only the values are different
How was the System Developed? o Led by New Buildings Institute o Volunteer effort by A&E practitioners across US o Proven through prototype DOE-2 simulations and real projects o Version 2 Core (July 2007) builds on success of Benchmark (2005)
What’s behind Core Performance? • Based on Benchmark, NBI’s previous publication, and extensive peer review • More than 50,000 energy modeling evaluations • Three major building prototypes (retail, office, schools) • Four high efficiency HVAC permutations for each prototype • Evaluated for climate variations for 19 U.S. cities
Building Characteristics Project Size
By Number of By Total Projects Floor Space
25,000 sf or Less
89%
37%
50,000 sf or Less
95%
50%
Source: CBECS-2004
3 Core Performance prototypes •
Office – Two-story building, 20,000 square feet – Five HVAC configurations – PVAV-gas and electric, PSZ-gas and electric, PHP
•
School – – – –
•
Elementary school 50,000 square feet Four HVAC configurations WLHP-gas boiler and cooling tower, PVAB-gas boiler, PSZ-gas and electric
Retail – – – –
One-story building, 12,000 square feet Sales and storage areas Three HVAC configurations PHP, PSZ-gas and electric
Identifying the Core Measures • Significant Savings • Consistent across climate and system • State of the Shelf Technologies • Cost Effective Savings Curve by System 0.45
Phoenix San Francisco
45%
0.4
Miami
40% 35% PVAV-GAS
0.3
PVAV-ELEC
0.25
PSZ-GAS 0.2
PHP
0.15
PSZ-ELEC
% Savings
0.35
Boise
30%
Chicago Baltimore
25% 20%
Duluth Helena
15%
Albuquerque Memphis
10% 5%
0.1 0.05
El Paso
4
5
6
7
8
9 10 11 12 13 14 15 16 17
# of Measures
9
7
# of Measures
15
3
13
2
11
1
5
0
3
0% 1
% S avin g s
Fairbanks
PSZ-GAS-Office
Houston Burlington Seattle
Cost analysis HVAC Equipment; Cost Implications of Reduced Capacity Requirements Units used for cost estimating: nominal capacity (tons) Baseline Code Efficiencies Weathermaker Weathermaker Weathermaker
48TM006 48TM012 48TMD025
5 10 20
BTUh
SEER
57,000 114,000 236,000
10.0
First Increment Performance Measure: NW Best/Reach AB 1.0 Weathermaster 48HJ006 5 61,000 13.0 Weathermaster 48HJ012 10 120,000 Weathermaster 48HJ024 20 234,000
EER
Units with comparable performance, but "one size" smaller: nominal capacity (tons) BTUh SEER EER Savings Weathermaker Weathermaker Weathermaker
48TM005 48TM009 48TH020
4 8.5 18
47,000 100,000 202,000
10.0
10.1 9.5
Weathermaster Weathermaster Weathermaster
48HJ005 48HJ009 48HJ020
4 8.5 18
45,000 103,000 200,000
13.0
11.0 10.8
4 8.5 18
47,500 102,000 202,000
14.1
Second Increment Performance Measure: Beyond NW Best/Reach AB1.0 Centurion 48PG06 5 58,500 14.0 Centurion 48PG05 Centurion 48PG12 10 119,000 12.0 Centurion 48PG09 Centurion 48PG24 20 238,000 11.5 Centurion 48PG20 Notes: Difference in cost when efficiency strategies allow purchase of a smaller RTU. E.g., rather than purchase of 5-ton Weathermaker 48TM006, purchase 4-ton Weathermaker 48TM005
10.1 9.7
$ 1,351 $ 1,653 $ 4,564
11.6 10.8
$ 2,387 $ 2,799 $ 5,542
12.2 11.6
$ 2,622 $ 3,317 $ 6,225
Core Performance results Core Performance Modeling Results 45%
Savings over 90.1-2004
40% 35% 30% 25% 20% 15%
Office
10%
School
5%
Retail
0% Climate Zones 1-8
Core Performance and NBI Supporters • Efficiency Vermont • Energy Center of Wisconsin • National Grid • NEEA • NSTAR • US EPA • USGBC • Massachusetts • Maine
• • • • • • • • •
ACEEE Cascadia GBC CEC Energy Center of Iowa Energy Foundation NEEP NYSERDA NRDC Southern California Edison
The market for Core Performance • Architects, engineers and building owners who want improved energy performance • Small to mid-sized projects up to 70,000 square feet • Buildings that would not otherwise complete energy modeling 95% of commercial projects are 50,000 square feet or smaller
Core Performance Guide Overview
Applicability of "Core” Method • Commercial Buildings ― 10,000 – 75,000 square feet ― Non residential (Economics fade for lodging, nursing homes, etc.) ― Economics based on buildings with mechanical cooling systems
Note: Anything for which “Core” is not applicable will still benefit from AB but requires Modeling to determine savings.
Applicability
Core Performance Page 16
Core requirements are applicable in all climate zones in the US .
Outline of Guide o Introduction o The “guts” of the document o Design Process Strategies o Core Performance Requirements o Enhanced Performance Strategies o Modeling
o Appendices
Exercise • How many of you know what HSPF stands for? – How many of you who know are architects and how many are engineers?
• How many of you know what SHGC stands for? – How many of you who know are architects and how many are engineers?
Core Performance Guide Resources New Building Institute (NBI) http://www.newbuildings.org
NBI Advanced Buildings http://www.advancedbuildings.net
NBI Advanced Buildings Core Performance Reference Materials http://www.advancedbuildings./refmaterials,htm
AB’s Conceptual Organization • •
Meets you where you are and takes you as far as you want to go Levels of Design Team Performance 1. Code Compliant 2. Single Measures 3. Core Performance Requirements 4. Enhanced Performance Strategies 5. Energy Modeling
Legal Minimum (Lowest First Cost Thinking)
Code Compliance
0%
Better
Single Measures
5-20 %
Code Compliance
0%
The “Perfect Balance” The Most Cost Effective, Comprehensive Efficiency for Least Effort
ID
Core Performance
M&V
30 %
Single Measures
5-20 %
Code Compliance
0%
Reaching Even Higher (The Best “Next Steps” Beyond Core)
Enhanced Performance
30 % +
Core Performance
30 %
Single Measures
5-20 %
Code Compliance
0%
The Ultimate Approach
Energy Modeling
50 %
Enhanced Performance
30 % +
Core Performance
30 %
Single Measures
5-20 %
Code Compliance
0%
One Program for All Levels The stepped approach aligns with any level of experience or budget. It covers from the smart first steps right up to the ideal modeling approach.
Core Performance Guide
Quick Start Guide
Brief Explanation of All Criteria
Quick Start Guide Appropriate Design Phase for Implementation of each Criteria
Quick Start Guide Role of Team Members in Each Criteria
Quick Start Guide One Page List of All Criteria
Relationship to LEED • Created by NBI, coordinated with USGBC • Adopted by USGBC for LEED NC Points • Latest LEED NC energy requirements: – Mandatory Requirement: Now 14% above ASHRAE 90.1-2004 • Prescriptive alternative for 2-5 points in LEED Energy and Atmosphere credit 1 • Energy Modeling not Required LEED is strictly an OPTIONAL companion for Advanced Buildings
LEED Energy and Atmosphere Points • For projects under 100,000 sf • 3 points for following Core Performance mandatory requirements (Sections 1 and 2) for Office, School, Public Assembly, and Retail • 2 points for all other project types (except Health Care and Warehouse) • Up to 2 additional points; • 1 point for every three Enhanced Performance Strategies implemented • Cool Roofs, Night Venting, and Add’l Cx not included
Other LEED Relationships
Design Process Strategies
Design Process Strategies • Three Basic Subsections – Design Process Optimization • 1.1 Identify Design Intent • 1.2 Communicating Design Intent
– Building Optimization • 1.3 Building Configuration • 1.4 Mechanical System Design
– Quality Assurance • 1.5 Construction Certification (Acceptance Testing) • 1.6 Operator Training and Documentation • 1.7 Performance Data Review
Design Process Strategies • Design Process Optimization – 1.1 – 1.2
Identify Design Intent Communicating Design Intent
• How to get the whole development team on board with the energy goals for the project. • Architects in the lead.
Design Process Strategies
1.2 Specific Communication Strategies • Summary of Design Goals and Strategies • Operational Performance Requirements (evolves into Owner’s Manual) •Basis of Design and Building Loads •Sequence of Operations •System and Operation Description
• Acceptance Testing Requirements • Construction Documents Include: • Descriptive Performance Specifications • Performance Criteria in Bid Alternate Requirements
• Operations Guidelines and Training
Building Optimization • 1.3 Building Configuration
HVAC
• 1.4 Mechanical System Design
“Right Sizing” is Critical
1.3 Building Configuration Optimization
Interior shelves bounce light off reflective ceilings
Exterior Shading Devices Control Direct Solar Penetration
1.3 Building Configuration Optimization Be Aware of Seasonal Changes North side Clerestory provides daylight year-round with little solar load
Low winter sun strikes solid wall which blocks workspaces beyond
1.4 Mechanical System Efficiency What do architects have to do with HVAC efficiency?
• Input for Integrated Design Affects Loads – – – –
Orientation Envelope Lighting Glazing
• Hold fast to AB Core Performance envelope/ lighting design criteria
1.4 Mechanical System Design • Carefully select Mechanical Engineer – Beyond Code design experience – Size for real loads – Select for part load efficiency
• • •
Set efficiency goals Provide the right information early Hold engineers accountable
Not your average engineer
☼
1.4 Impact of Integrated Design on HVAC Capacity Ventilation
Heating
Cooling
Lighting
1.4 High Level “Right Sizing” Benefits HVAC • First Cost Savings – eliminate or value engineer HVAC systems – Transfer $$ to architectural elements
• Energy savings • Increased Comfort • Reduced Noise
Heat Recovery ventilation
Design Process Strategies • Quality Assurance – 1.5 – 1.6 – 1.7
Construction Certification (Acceptance Testing) Operator Training and Documentation Performance Data Review
Actual and Design EUI Scatterplot 120
Actual = Design
Actual E U I
100
80 regression line (r2 = .33)
60
40
20
0
0
20
40
60 80 Design EUI
100
120
Performance Data Review • Install Meters capable of tracking hourly energy use • Collect data • Compare to daily temperature •Compare to building occupancy schedule
Predictable Performance Correlation of Outside Temperature and Average Power Use is High Performance Map gas heated office occupancy
Average Power, W/ft2
3 2.5
1100 ofc pre SLC post SLC 500,000 ft2
2 1.5 1 0.5 0 30
40
50
60
70
Mean Outdoor Temp, deg F
80
90
Intuitive Results Correlation of Occupant Use Patterns and Average Power Use can provide a simple, intuitive analysis tool 15 or 60 minute interval data shows a level of detail useful to building operators baseload Normalized Power, W/ft2
3 2 1
Time
7:30:00
10:45:00
4:15:00
1:00:00
21:45:00
18:30:00
15:15:00
8:45:00
12:00:00
5:30:00
2:15:00
23:00:00
19:45:00
16:30:00
13:15:00
10:00:00
0 6:45:00
0-1
4
3:30:00
1-2
6 5
0:15:00
2-3
7
21:00:00
3-4
9 8
17:45:00
5-6 4-5
Baseload, kW
Day of Week
10
14:30:00
23:00
21:00
19:00
11
11:15:00
Time of Day
17:00
15:00
13:00
11:00
9:00
7:00
5:00
3:00
1:00
Mon Sun Sat Fri Thu Wed Tue Mon Sun Sat Fri Thu Wed Tue
Π
Occupants as Sensors C H Temperature Temperature 11 Air AirQuality Quality
Lighting Lighting 11 11 22
Overall OverallBuilding Building 11 0% 0% uncomfortable uncomfortable
16 16
88
33 10% 10%
20% 20%
10 10
99
55 30% 30%
40% 40%
neutral neutral
50% 50%
55
33
77
66
77
Acoustics Acoustics
99
55
11 11
22 11
66
99
77
55
60% 60%
70% 70%
80% 80%
90% 90% 100% 100%
comfortable comfortable
Sample System Architecture
Or equivalent systems
Core Performance Requirements
Dual Use of the Term “Core” •
The “Core Performance Guide” contains criteria for 3 levels of approach: 1. 2. 3.
•
Core Criteria (2.1 to 2.13) Enhanced Criteria Modeled Criteria
“Core Approach” equates with the basic Core Performance section excluding the Enhanced and Modeled sections
Core Performance Criteria 2.1 Energy Code Compliance 2.2 Air Barrier Performance 2.3 Minimum IAQ Performance 2.4 Below Grade Exterior Insulation 2.5 Opaque Envelope Performance 2.6 Fenestration Performance 2.7 Lighting Controls
Core Performance Criteria 2.8 Lighting Power Density 2.9 Mechanical Equipment Efficiency Requirements 2.10 Dedicated Mechanical Systems 2.11 Demand Control Ventilation 2.12 Domestic Hot Water System Efficiency 2.13 Fundamental Economizer Performance
2.1 Energy Code Compliance Meet or exceed State/Local Energy codes or ASHRAE/IESNA Standard 90.1-2004 or the IECC 2006 (whichever is more stringent)
2.2 Air Barrier Performance • Reduce uncontrolled air movement through the building envelope to: – Control humidity and temperature – Reduce energy losses
• Requirements: Pages 46-47 • Sample sections can be found at: www.state.ma.us/bbrs/sample_details.htm [search for “vapor barriers”]
Air Barrier Savings • Clearly substantiated in NIST and ASHRAE studies • No standard levels established for energy modeling • Savings are “real” but not in Advanced Buildings case studies or models • No utility incentives
HVAC
2.2 Air Barrier Cost Savings • Prototype Building Description: – – – –
•
24,200 square feet Office building (two stories) Window to wall ratio of 0.2 Floor-to-floor height 12 feet Single elevator shaft
Energy cost savings due to implementation of air barrier: – –
St Louis, MO: Minneapolis, MN:
$3,016/yr $3,683/yr
– –
Heating vs. cooling savings split equally NOTE: Add 15% to 20% to adjust for current energy prices.
Data from National Institute of Testing and Standards Report NISTIR 7238 www.bec-national.org/resources.html
2.3 Minimum IAQ Requirements • Follow ASHRAE 62-2001 – IAQ Construction Management Plan – Pre-occupancy Flush Out Plan – Ongoing IAQ Operations Management Plan
• Not required for utility incentives or LEED EA specific credits
2.4
Below Grade Exterior Insulation
• Establishes minimum insulation R-value only applies to: – Buildings designed specifically for youth or elderly – Buildings with periods greater than 7 days when mechanical systems are shut down – Buildings that don’t have a mechanical cooling systems
2.5 Opaque Envelope Performance • Meet specific insulation criteria for each building envelope assembly • Insulation requirements vary by climate. All guidelines exceed ASHRAE 90.1-2004 criteria
Applicability Core Requirements are applicable in all climate zones in the US
2.5 Modeled Optimum Insulation R-Values Zones 4, 5 & 6
Roof Insulation R25 – R30
HV AC
Wall Insulation R19
Floor Insulation R10
Exercise • What is the prescribed insulation value for walls above grade in a metal framed building in Seattle? – How might this likely be achieved?
• What is the prescribed insulation value for walls above grade in a wood framed building in Boise? – How might this likely be achieved?
2.5 Opaque Envelope Is it burdensome?
• At or above Washington and Oregon code • Provides options for rigid and fill types • Payback is long on its own if you look only at energy, not at shell integrity and rightsizing
AB Certification Helps Envelope Value Engineering • •
• •
Walls: Added 3-1/2” batt insulation to continuous 2” rigid foam. Glazing: ― Upgrade U value from 0.42 to 0.31 ― Upgrade SHGC from 0.50 to 0.30 Projected envelope savings: $1,500 Incremental Costs: $14,400 Payback: 9 years
2.6 Fenestration Performance • •
U-factor for heat loss¹-² SHGC for cooling load¹ – SHGC varies by Projection Factor (PF)
• VLT/SHGC ratio • Applicable when glazing 0.65, and >0.50 three years later required
HVAC
∑
3.2 Daylighting and Controls Fully incorporated daylighting in all toplit and side-lit spaces
3.2 Case Study: Logic Supply • Two groups of daylight harvesting sensors – Window and skylight areas – 10 Skylights cost $17,500 – Controls cost of $6,200
3.3 Enhanced Performance LPD Values
HVAC
3.3 Additional Lighting Power Reductions EPACT 2005 offers tax incentives for lighting power reductions up to 50%. For examples of lighting that meets that standard, visit: www.lightingtaxdeduction.org or www.gettingtofifty.org
HVAC
3.4 Plug Loads/Appliance Efficiency • All appliances and equipment must meet Energy Star requirements • Include control of plug loads in controls design as possible
3.5 Supply Air Temperature Reset Reset supply air temperature to warmest delivery temperature that meets cooling load in all zones during shoulder seasons
3.6 Indirect Evaporative Cooling
EER (Btu/hr/watts)
Indirect evaporative precooling for incoming supply air 13.5 13.0 12.5 12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0
Com
85F
p res
90F
sor C
o o lin
95F
100F
E va
g >>
105F
110F
t a r po
115F
i
o C e v
t (n o
t
o
> g n li
al c s o
120F
o
Outdoor Te mpe rature ( F) Sta nda rd Unit
High Efficie ncy Unit
Poly. (High Efficie ncy Unit)
Poly. (Sta nda rd Unit)
>
e)
125F
130F
3.7 Heat Recovery • Incorporate a heat recovery system in the ventilation air exhaust stream for HVAC systems with high ventilation rates (Generally 30% Outside Air or higher).
HVAC
3.8 Night Venting Install fan control system capable of night ventilation to pre-cool building mass during the cooling season
3.9 Premium Economizer Performance Additional strategies to increase the effectiveness of the Economizer system
3.10 Variable Speed Control Install VSD on pump and fan motors of 5 hp and above
40% 18%
3.11 Demand Responsive Buildings
Reduce Peak Power Demand – Identify and control at least a 10% interruptible load in the building – Provide an interface to the utility capable of responding to real-time signals – Financial Benefits: Various utilities administer incentive programs for this. Payouts can be lucrative.
3.12 Renewable Energy Incorporate on-site renewable energy system to supply at least 5% of building electrical loads.
3.13 Additional Commissioning • Use of a credentialed third party commissioning (Cx) agent • Cx Agent verifies construction drawings will satisfy Advanced Building Core Performance Criteria and any Enhanced Criteria elected • Cx Agent documents results of Cx.
∑
3.14 Fault Detection Diagnostics Incorporate FDD capabilities in all manufactured rooftop HVAC equipment to monitor equipment performance
Energy Modeling
4.1 Predict Performance with Energy Modeling • Use an hourly energy model simulation tool to incorporate building features that exceed the requirements of ASHRAE 90.1-2004 by 20% or more. • Can use both the prescriptive CORE Criteria and ENHANCED Criteria as a springboard for establishing efficiency features.
4.1 Predict Performance with Energy Modeling • For projects that: – Exceed Core glazing parameters (40%) – Complex HVAC systems (GSHP’s, Chillers, gas fired cooling) – Spaces with high internal heat loads (medical equipment, heavy electronics , process loads) – Desire to accurately quantify savings – For more LEED Energy & Atmosphere Points
4.1 Modeling Support (Under development) • Advanced Design Guidelines (under development): Advanced Lighting Performance Advanced Mechanical and Controls Daylighting Renewable Energy Systems www.newbuildings.org
Case Studies Fidelity Bank Barre Medical
Case Studies
NOTE: These case studies incorporate many of the Core Performance requirements but were not designed or constructed under the current program.
Fidelity Bank Corporate Office Leominster, Massachusetts
Completed January 2007
Design Intent Prior to adopting Advanced Buildings • Best appearance at the lowest first cost • “Value Engineer” MEP and lighting to contain costs
With Advanced Buildings • Provide an attractive return on investment • Maximize utility incentives • Cut utility costs by 20% or more
31% Improvement Over Code Lighting $7,200
Building Envelope HVAC
$1,500
$18,900
Annual Energy Costs
Savings Components ($27,600 annual savings)
Savings Projection • Projected Energy Savings: $ 27,600 • Incremental Costs (Upgrades) • Utility Incentives: • Net Owner Costs:
$100,622
$ 34,035
• Payback with Incentives: 1.2 years ROI: 83% • Payback without Incentives: 3.7 years ROI: 27%
Advanced Building Process Building Configuration • Missed Opportunity due to late involvement
Mechanical systems • Sizing: Contractor resisted on downsizing units • Part load opportunities: – Dedicated HVAC units for data rooms – Demand control ventilation for cafeteria • More efficient RTUs
AB Opaque Envelope Features •
Air Barrier: Required by code
• •
Slab Edge Insulation: Required by code Walls: Added 3-1/2” batt insulation to codecompliant 2” rigid foam Windows: U value to 0.31, SHGC to 0.3
•
Advanced Buildings Bundling Closes the Sale Incremental envelope cost $14,400 Utility Incentives Net owner cost
Projected envelope savings:
($ 1,700) $12,700
$ 1,500
Payback (Stand alone Hard Sell) 8.5 years
AB Lighting Features • Open office areas
T-5 pendant
• Conference, etc.
RT-5 Troffer
• Ceiling height increase of 3” with pendant • Occupancy sensors in offices • Bi-level switching in offices and conference rooms
AB Lighting Power Density
Lighting Power Density
Mass Energy Code
Advanced Buildings Criteria
1.34 w/SF
0.96 w/SF
Final Design % Reduction
0.86 w/SF
Projected Lighting Savings: $ 7,200
36%
AB HVAC Features AB Additional Investments: • 10.2 EER HVAC units • Demand Controlled Ventilation in Cafe • ECM Motors on VAV fan boxes • Upgraded to Dual Enthalpy Economizer • Dedicated Data Room cooling unit The focus is on part load efficiency!
HVAC Financial Analysis • Efficient HVAC Cost:
$ 34,100
• Projected HVAC Savings:
$ 18,900
• Payback before Incentives: 1.8 years HVAC enhancements that deliver!
Distribution of Savings Envelope
5%
Lighting
25%
HVAC
70%
Gas
20%
Electric
80%
Envelope Lights HVAC
Value in Construction Certification • Utility identified RTU’s unfamiliar to MEP team • Utility taught electric contractor new lighting design practices to meet LPD allowance • Third party commissioning added to project scope and cost – covered by utility
Lesson Learned through Commissioning Conduct Part Load Study of Ventilation Rate • VAV RTU specified with fixed OA damper positioning • No direction on OA fraction for VAV system • Balancer set OA fraction at max fan volume creating potential for insufficient OA in winter • Corrected by adding automation through EMS.
Additional Benefits • • • •
Higher quality, more attractive lighting Quieter due to wall cavity insulation Boost to employee relations Leased space immediately to tenant attracted to attractive lighting and low utility cost • Unmistakable drop in absenteeism • Remarkable increase in job applications • Trades and design team learned new practices ☺
More Sustainability with Less Effort UMass Memorial Barre Family Health Center Case Study Barre, Massachusetts
Advanced Building Elements • Reduced Lighting Power Density • Lighting Control Efficiency • High Performance Rooftop Units • HVAC Controls Upgrades • High Performance Glazing • Cool Roof Completed June 2007
AB Savings Projection •
Projected Energy Savings:
$ 7,200
•
Incremental Costs (Upgrades:): $44,400
•
Utility Incentives:
-$ 37,200
•
Net Owner Costs:
$ 7,200
•
Payback with Incentives: 1.0 years ROI: 100%
•
Payback without Incentives: 6.0 years ROI: 17%
AB Savings Projection 23% Improvement Over Code Building Envelope $600
HVAC $1,660
$35,000 $30,000 $25,000 $20,000
$31,840
$15,000
$24,620
$10,000
$4,960
$5,000 $0
Lighting
Savings Components ($7,220 annual savings)
Code
Advanced Buildings
Annual Energy Costs
AB Lighting Projection T-5 Recessed style (Cooper Accord) Projected Lighting Savings: $4,960
LPD
Mass Energy Code
Advanced Buildings Criteria
1.50 w/SF
1.13 w/SF
Fixtures: $30,000 Occ. Sensors $9,000
Final Design % Reduction
1.10 w/SF
27%
AB HVAC Projection Advanced Buildings additional investments: • HFC-407C refrigerant – 20% more efficient than HCFC-22 (10.6 EER) • High Part Load Efficiency – Scroll Compressor RTU’s – Dual Enthalpy Economizer – Demand Controlled Ventilations (CO2 Controls) – DCV Economics - cost approximately $3,500; Savings $2,400 annually
AB HVAC Projection •
Projected HVAC Savings:
$ 1,660
•
Efficient HVAC Cost (Controls):
$ 3,900
•
Payback before Incentives:
•
ROI 40%
2.4 years
Envelope Improvements •
Cool Roof (No cost!)
•
Glazing: •
U value (unit assembly) of 0.45
•
SHGC 0.34
•
Incremental Cost:
$1,500
•
Projected envelope savings: $ 600
•
Payback without Incentives:
2.5 years
ROI = 40%
New Buildings Institute Support
www.advanced buildings.net
Summary of Today’s Learnings • Benefits of Advanced Buildings™ • How and when to apply the Advanced Buildings™ design criteria • Local Advanced Buildings™ support
Thank you!! This concludes The American Institute of Architects Continuing Education Systems Program.
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