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Steven Winter Associates, IncBuilding Systems Consultants
The Greening of Historic Preservation:Keeping the “Green” in Our Pockets
Presented by:
Ryan MerkinSteven Winter Associates
IPED National Historic Tax Credit Conference November 8, 2007
Washington, DC
Steven Winter Associates, IncBuilding Systems Consultants
Steven Winter Associates,Inc.
Building Systems Consultants - Founded 1972
Expertise:
• Energy Efficiency
• Historic Preservation
• Advanced Building Systems
• Indoor Environmental Quality (IEQ)
• Systems Engineering and Optimization
• Accessibility and ADA Compliance
Integrated “Whole Building” Approach
Steven Winter Associates, IncBuilding Systems Consultants
Steven Winter Associates,Inc.
Historic Design Charrettes & Strategic Planning
Malden Mills: Lawrence, MA• 800,000 SF vacant space in 10 mill buildings
• Redevelopment 500 units mixed-income housing, renovations utilizing historic tax credits
• Seeking LEED for Homes Certification
American Locomotive Works: Providence, RI• 18.5 acre site combination mill buildings and new construction
• Seeking LEED ND & LEED for Homes Certifications
Steven Winter Associates, IncBuilding Systems Consultants
Energy Costs in Historic Preservation:
How Much our Buildings Use and Why
Steven Winter Associates, IncBuilding Systems Consultants
Range of Energy Usage in Buildings
0
5
10
15
20
25
30
35
40
Heat
Hot Water
All listed in Btu/ft2/HDD
SingleFamilyUSA
LowIncomeSingle FamilyNYS
LowIncomeMulti- FamilyNYS1996
SelectedNew
Afford. Rehabs
NYC1996
MiddleIncomeMulti- FamilyNYS2006
MelroseCommons
2002
Steven Winter Associates, IncBuilding Systems Consultants
A Top 10 Owner of NYC Properties:Multifamily Energy Usage
0
5
10
15
20
25
30
35
40
45
50
1
Steven Winter Associates, IncBuilding Systems Consultants
What does this mean in energy costs?
0
1
2
3
4
5
6
7
8
$/ ft$/ Year
Gas CostAssumes
$1.85/therm
Steven Winter Associates, IncBuilding Systems Consultants
Fuel Cost/Room ($)
GasOilDual
Total Buildings 319
< $200 50
$200-$249 113
$250-$299 63
$300-$399 59
$400-$499 25
$500-$599 2
$600-$699 3
$700-$799 4
Bank Buildings - Fuel Costs per Room 2006
Steven Winter Associates, IncBuilding Systems Consultants
What if we Miscalculate?
Steven Winter Associates, IncBuilding Systems Consultants
Urban Horizons NYC: Recommendations
$150,000 Energy Cost Savings<5 Year Payback Water Saving Devices New Toilets Lighting Retrofit Refrigerators Airsealing Ventilation System New Heat and DHW Systems Combined Heat & Power
Steven Winter Associates, IncBuilding Systems Consultants
High Performance Building Design Strategies
• Design and build a better building envelope• Build tight, ventilate right• Size the HVAC to the building load (math required)• Reduce avenues for water penetration
• Specify high efficiency HVAC, appliances, & lighting• Specify materials with fewer pollutants• Reduce water usage in buildings• No unproven technologies, gadgets, or high costs
Steven Winter Associates, IncBuilding Systems Consultants
Why Do We Miss All of This Stuff?
• Few pre-design team meetings, if any
• Engineers and architects not talking
• Consultants who don’t focus on the building first
• Neglecting to bring management and maintenance staff into design meetings
• Lack of pre-CD energy modeling
Steven Winter Associates, IncBuilding Systems Consultants
Most Common Missed Details in Drawings/Specs
• Airsealing (firestopping?)
• Sealing and flashing of penetrations
• Inspecting of insulation prior to sheetrock
• Duct sealing and balancing
• Sizing of HVAC equipment to load
• Water use devices (aerators, showerheads, toilets)
Steven Winter Associates, IncBuilding Systems Consultants
Oh, yeah, HVAC system selection……..
Who was it that thoughtair sourceheat pumpswere a goodidea inBoston?
Steven Winter Associates, IncBuilding Systems Consultants
Historic Case Study: Cambridge, MA
Domestic Hot WaterThermal efficiency <65%Retrofit high efficiency combined heating and hot water heating system and reduce hot water temperature to 120ºF
WaterShowerheads, faucet aerators, toilets
VentilationMove thermostatic controlsTest and balance system
Windows$1,100 per window replacement not cost-effective
Steven Winter Associates, IncBuilding Systems Consultants
Historic Case Study: Richmond, VA
Lighting24 Hour Stairwell LightingUtilize daylighting or install bilvelel dimming fixtures
Track Lighting in Offices100W Halogen Lamps replace with 23W CFL
Occupancy sensors in lounge, meter rooms, refuse closets, restrooms.Photosensors for outdoor lighting
Health & SafetyBulk purchase of green cleaning productsCO detectors in apartments
Steven Winter Associates, IncBuilding Systems Consultants
Historic Case Study: Philadelphia, PA
LED Lighting
Lobby and Leasing Offices• 100 Halogen Track Fixtures• 50W per Lamp• Rated 3,000 Hours• At $0.12/kWh = $5,250
Retrofit• 3W or 6W LED• Rated 25-50,000 Hours • At $0.12/kWh = $315 - $630
At $35/lamp, payback < 1 yr Not to mention, maintenance costs and cooling load reduction…
Steven Winter Associates, IncBuilding Systems Consultants
Thank You.
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