successful leed projects in the southwest
DESCRIPTION
Presentation given at the Eco El Paso conference, featuring case studies of 6 LEED projectsTRANSCRIPT
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Successful LEED Projects in the Southwest: Process and Results
www.dpsdesign.org
Julie Walleisa, AIA, LEED AP
200+ person multidisciplinary firmOffices in NM, TX, NV
7 LEED certified projects20 LEED registered projects
8 projects Designed to Earn the ENERGY STAR
D/P/S Background
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Case studies
Lessons learned
SchoolsPublic
Design‐BuildPrototype
Case studies
Lessons learned
CommercialPrivate
Partial design‐build
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Case studies
Lessons learned
UniversityLabratoryHousing
Public bid
Sandia Vista Elementary
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Separatetraffic
ShelterPlayground
Supervise
Adjust to topography
Future expansion
Efficientcirculation
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Increased insulationR‐24 walls, R‐38 roof
Efficient low‐e glazing
High‐efficiency mechanical units
Waterlessurinals
Dual‐flush toilets
Faucet restrictors
Low‐emitting materials
RecycledmaterialsAluminum, steel, insulation, gypsum board, ceiling tile, concreteCeramic tile, toilet partitions
RegionalmaterialsCMU, concrete, asphalt, gravel, plantsGypsum board, sheathing
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Construction Recycling
IAQManagement Plan
Commissioning
Premium
PaybackWater and energy
Hard and soft costs
OwnerArchitectContractor
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Stapleton Cordova Sandia Vista CieloAzulCost: $9.3M $10.2M $14.1M $14.7M
Size: 73,000sf 76,000sf 85,500sf 85,500sf
Site: $150,000 $109,000 $540,000 $1,076,000
Escalation 2004 to 2007: 1.25x
Adjusted: $160.22/sf original $162.31/sf new
1.3% premium
Savings:
Utility bills for originals
Models/calculations for newProjected savings on electricity, gas, water
$0.87/sf/yr$73,000 per school per year
2 year payback projected
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LEED Silver certified
Construction RecyclingOver 1,000 tons of material
The amount of metalused to produce 87 cars
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The amount of concretein 2 miles of 4’ wide sidewalk
The amount of wood in
284 telephonepoles
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The amount of
cardboard and paperproduced by 5 trees
Indoor water conservation: actual numbers
5 year savings: 1M to 1.8M gallons
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
9.000
10.000
ESES MCES CAES SVES
87,5
70 s
f 78,6
10 s
f
85,5
13 s
f
85,5
13 s
f Gal
.
Water & Sewer ConsumptionGal. per Sq. Ft.
7.4
9.3
5.0 4.9
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“Clone” schools?
Same designers… Same general
contractor… Same specs…
Different results!
CWM: 66% vs 73%
Recycled and regional:$1M more in Div 2 = lower %
Commissioning:Factory defect in dampers at CieloAzul
Lessons Learned
N
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Tracking
$0.54
$0.55
$0.56
$0.57
$0.58
$0.59
$0.60
$0.61
$0.62
$0.63
$0.64
$0.65
ESES MCES CAES SVES
87,5
70 s
f
78,6
10 s
f
85,5
13 s
f
85,5
13 s
f
Elec. ConsumptionRate per Sq. Ft.
0
100
200
300
400
500
600
700
MCES ESES CAES SVES
481
610.5
252196
Staff Sick Days2008 ‐ 2009 SY
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Already seeing:
Water savingsElectricity savingsReduced teacher absenteeism
Limitations:Gas usage not yet clear
1st year data is incompleteCommissioning during part of first year
Need 2‐3 years of data for it to be meaningful
Tony Hillerman Middle School
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Design‐Build
Detailed RFP
2‐stage selection
First for APS
1,200 studentsGrades 6‐8170,000sf
2 separate buildingsNW Education Corridor
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RFP required:
21% energy savings
Aircuity system4 pipe systemWater cooled chillersDDC control systemT8 (not T5) lampsDaylight sensorsOccupancy sensorsENERGY STAR appliances
Fast‐track scheduleGreen Path expedited review
LEED Silver with 6 EA points
Needed to get to 28% savings
Added Features:
Improved insulationR‐38 roofR‐24 wall
White TPOmembrane roof
30% final energy savingsglazing
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Low‐emitting materialsRecycled and regionalLinoleum flooringDaylight and viewsOperable windows
46% water savings
Recycled 89% construction waste
LEED Silver/Gold certification pending
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Lessons Learned:4‐pipe system = good acoustic control
Water‐cooled chiller boosts energy savings
Fast track process complicates commissioning review
Waiting to see impact of Aircuity system
Design‐build pros & cons:
Good team might exceed performance goals while meeting budget
Difficult to work with multiple demands: LEED goal, energy savings goal, and detailed system requirements
Jefferson Green
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• 2 separate LEED projects
• LEED-CS Gold
• LEED-CI Gold
Preserved existing trees
Passive harvesting
Xeric landscaping
Non‐potable line
Cutoff light fixtures
Bike racks
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OrientationShading
Reflective R‐30 roof
Operable windows
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UFADEvaporative cooling
Direct/indirect
Free cooling
Refrigerated backup
Rooftop AHUs
T5 lighting
45% energy savings
875 floor diffusers
158 operable windows
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Integrateddesign of UFAD:
Reduced building height by 2’‐6” Downsized equipment
Detailing of walls and penetrations
Diffuser, flooring, and furniture coordination
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32% recycled
67% regional
Innovation points
Standardmaterials
Aluminum 40% recycledCarpet 30% recycled
80% construction waste recycled
Natural linoleum flooring
Xorel and Forbowall coverings
Low‐emitting
Green Guard, recycled furniture
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5% investment, 5 year paybackEUI = 34 to 36 kBtu/sf/yrUtility bills lower than previous building
ENERGY STAR rating of 99 Utility costs $0.70/sf/yr ‐ average is $2/sf/yrEnergy savings = $110,000/yr
Impact on employee recruitment, retention, productivity
2008 2009
Benefits: Environment2008 operations impact:6,290,000 kBtus energy
858 tons CO2 emissions 598 pounds of cardboard
18,050 pounds of paper 85 pounds of plastic
Impact adds up across projects Impact adds up over time
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The Thornburg Campus
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Lessons learned from Jefferson GreenHighest performance in NM
47% energy savingsUFADEvap coolingAir‐cooled chiller
43% water savingsWaterless urinalsDual flush toilets
90% waste recycled
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Xeric landscaping
Gravelparking50,000g underground cisternRoof garden for employees
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Extensive daylight studies
Horizontal overhangsVertical finsDramatic effect
T5 lights
Daylight sensorsOccupancy sensors
Operable window
Notification system
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UNLV Science & Engineering
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32% energy savings
GlazingRoof insulationDaylight sensorsOccupancy sensorsEvaporative pre‐coolingWater cooled chillerZoned BMS
Fume hoods:VAVOccupancy sensors
42% water savings55% wastewater savings
Low‐flow sinksLow‐flow urinals
Water reuseReverse osmosis reject water
750 gallons/day1,500 gallon tank
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RegionalRecycledLow‐emittingDurable
Local sandstone
60% construction waste recycled
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NMHU Student Housing
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Community connectivity
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Heat Islands: Roof
51% water savingsDual flush toiletsLow‐flow showers and faucetsNo urinals
20,000 gal cisternXeric landscaping
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24% energy savings
Wood frame, R‐21 insulation
Thermally broken low‐e windows
Efficient lighting
Fan coil units – DX cooling, hot water heating coil, rooftop condensing unit
Conclusions
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Innovation points:
Education program
Green cleaning
Chemicalmanagement
Reduce impact of churn
Exemplary performance
Big lessons:
Any deliverymethod
Any building type
Specs are key
Do 10 common sense things
Stretchon 1‐2 things
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Focus on
performance andpayback
Use incentives
0.5% to 5% premium
Track and translatesavings
Use ENERGY STAR
Share the results
www.dpsdesign.org
Thank you!
Julie Walleisa, AIA, LEED [email protected]