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Successful LEED Projects in the Southwest

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Presentation given at the Eco El Paso conference, featuring case studies of 6 LEED projects

Presentation given at the Eco El Paso conference, featuring case studies of 6 LEED projects

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  • 1. 10/13/2009 Successful LEED Projects in the  Southwest: Process and Results Julie Walleisa, AIA, LEED AP www.dpsdesign.org D/P/S Background 200+ person multidisciplinary firm Offices in NM, TX, NV 7 LEED certified projects 20 LEED registered projects 8 projects Designed to Earn the ENERGY STAR 1
  • 2. 10/13/2009 Case studies Schools Public Design‐Build Prototype Lessons learned Case studies Commercial Private Partial design‐build Lessons learned 2
  • 3. 10/13/2009 Case studies University Labratory Housing Public bid Lessons learned Sandia Vista Elementary 3
  • 4. 10/13/2009 Separate traffic Shelter Playground Supervise Adjust to  topography Future expansion Efficient circulation 4
  • 5. 10/13/2009 5
  • 6. 10/13/2009 Increased insulation R‐24 walls, R‐38 roof Efficient low‐e glazing High‐efficiency mechanical units Waterless urinals Dual‐flush toilets Faucet restrictors Low‐emitting materials Recycled materials Aluminum, steel, insulation, gypsum  board, ceiling tile, concrete Ceramic tile, toilet partitions  Regional materials CMU, concrete, asphalt, gravel, plants Gypsum board, sheathing 6
  • 7. 10/13/2009 Construction Recycling IAQ Management Plan Commissioning Premium  Payback Water and energy Hard and soft costs Owner Architect Contractor 7
  • 8. 10/13/2009 Stapleton Cordova Sandia Vista Cielo Azul Cost: $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 new Projected savings on electricity, gas, water $0.87/sf/yr $73,000 per school per year 2 year payback  projected 8
  • 9. 10/13/2009 LEED Silver certified Construction Recycling Over 1,000 tons of material The amount of metal used to produce 87 cars 9
  • 10. 10/13/2009 concrete The amount of  in 2 miles of 4’ wide  sidewalk wood in  The amount of  284 telephone poles 10
  • 11. 10/13/2009 The amount of  cardboard and  paper produced by 5  trees Indoor water conservation: actual numbers 5 year savings: 1M to 1.8M gallons Water & Sewer Consumption Gal. per Sq. Ft. 9.3 10.000 9.000 7.4 8.000 78,610 sf 7.000 6.000 5.0 4.9 87,570 sf Gal. 5.000 85,513 sf 85,513 sf 4.000 3.000 2.000 1.000 0.000 ESES MCES CAES SVES 11
  • 12. 10/13/2009 Lessons Learned “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 Cielo Azul N 12
  • 13. 10/13/2009 Tracking Elec. Consumption Rate per Sq. Ft. $0.65 $0.64 $0.63 $0.62 87,570 sf $0.61 78,610 sf $0.60 85,513 sf $0.59 $0.58 $0.57 85,513 sf $0.56 $0.55 $0.54 ESES MCES CAES SVES Staff Sick Days 2008 ‐ 2009 SY 610.5 700 600 481 500 400 252 300 196 200 100 0 MCES ESES CAES SVES 13
  • 14. 10/13/2009 Already seeing: Water savings Electricity savings Reduced teacher absenteeism Limitations: Gas usage not yet clear 1st year data is incomplete Commissioning during part of  first year Need 2‐3 years of data for it to be  meaningful Tony Hillerman Middle School 14
  • 15. 10/13/2009 Design‐Build Detailed RFP 2‐stage selection First for APS 1,200 students Grades 6‐8 170,000sf 2 separate buildings NW Education Corridor 15
  • 16. 10/13/2009 16
  • 17. 10/13/2009 RFP required: 21% energy savings Aircuity system 4 pipe system Water cooled chillers DDC control system T8 (not T5) lamps Daylight sensors Occupancy sensors ENERGY STAR appliances Fast‐track schedule Green Path expedited review LEED Silver with 6 EA points Needed to get to 28% savings Added Features: Improved insulation R‐38 roof R‐24 wall White TPO membrane roof 30% final energy savings glazing 17
  • 18. 10/13/2009 Low‐emitting materials Recycled and regional Linoleum flooring Daylight and views Operable windows 46% water savings Recycled 89% construction  waste LEED Silver/Gold certification  pending 18
  • 19. 10/13/2009 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 19
  • 20. 10/13/2009 • 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 20
  • 21. 10/13/2009 Orientation Shading Reflective R‐30 roof Operable windows 21
  • 22. 10/13/2009 UFAD Evaporative cooling Direct/indirect Free cooling Refrigerated backup Rooftop AHUs T5 lighting 45% energy  savings 875 floor diffusers 158 operable windows 22
  • 23. 10/13/2009 Integrated design of UFAD: Reduced building height by 2’‐6”  Downsized equipment Detailing of walls and penetrations Diffuser, flooring, and furniture coordination 23
  • 24. 10/13/2009 32% recycled 67% regional Innovation points Standard materials Aluminum 40% recycled Carpet 30% recycled  80% construction waste recycled Natural linoleum flooring Xorel and Forbo wall coverings Low‐emitting Green Guard, recycled furniture 24
  • 25. 10/13/2009 5% investment, 5 year payback EUI = 34 to 36 kBtu/sf/yr Utility bills lower than previous building 2008 2009 ENERGY STAR rating of 99  Utility costs $0.70/sf/yr ‐ average is $2/sf/yr Energy savings = $110,000/yr Impact on employee recruitment, retention, productivity 2008 operations impact: Benefits: Environment 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 25
  • 26. 10/13/2009 The Thornburg Campus 26
  • 27. 10/13/2009 Lessons learned from Jefferson Green Highest performance in NM 47% energy savings UFAD Evap cooling Air‐cooled chiller 43% water savings Waterless urinals Dual flush toilets 90% waste recycled 27
  • 28. 10/13/2009 Xeric landscaping Gravel parking 50,000g underground cistern Roof garden for employees 28
  • 29. 10/13/2009 Extensive daylight studies Horizontal overhangs Vertical fins Dramatic effect T5 lights Daylight sensors Occupancy sensors Operable window Notification system 29
  • 30. 10/13/2009 UNLV Science & Engineering 30
  • 31. 10/13/2009 31
  • 32. 10/13/2009 32% energy savings Glazing Roof insulation Daylight sensors Occupancy sensors Evaporative pre‐cooling Water cooled chiller Zoned BMS Fume hoods: VAV Occupancy sensors 42% water savings 55% wastewater savings Low‐flow sinks Low‐flow urinals Water reuse Reverse osmosis reject  water 750 gallons/day 1,500 gallon tank 32
  • 33. 10/13/2009 Regional Recycled Low‐emitting Durable Local sandstone 60% construction waste  recycled 33
  • 34. 10/13/2009 NMHU Student Housing 34
  • 35. 10/13/2009 Community connectivity 35
  • 36. 10/13/2009 Heat Islands: Roof 51% water savings Dual flush toilets Low‐flow showers and faucets No urinals 20,000 gal cistern Xeric landscaping 36
  • 37. 10/13/2009 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 37
  • 38. 10/13/2009 Innovation points: Education program Green cleaning Chemical management Reduce impact of churn Exemplary performance Big lessons: Any delivery method Any building type Specs are key Do 10 common  sense things Stretch on 1‐2 things 38
  • 39. 10/13/2009 Focus on  performance and payback Use incentives 0.5% to 5% premium Track and translate savings Use ENERGY STAR Share the results Julie Walleisa, AIA, LEED AP juliew@dpsdesign.org Thank you! www.dpsdesign.org 39