The Greening of Historic Preservation: Keeping the Green in Our Pockets

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The Greening of Historic PreservationKeeping
the Green in Our Pockets

• Presented by
• Ryan Merkin
• Steven Winter Associates

IPED National Historic Tax Credit Conference
November 8, 2007 Washington, DC
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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

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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

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Energy Costs in Historic Preservation How
Much our Buildings Use and Why
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Range of Energy Usage in Buildings
All listed in Btu/ft2/HDD
Low Income Multi- Family NYS 1996
Single Family USA
Low Income Single Family NYS
Selected New Afford. Rehabs NYC 1996
Middle Income Multi- Family NYS 2006
Melrose Commons 2002
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A Top 10 Owner of NYC PropertiesMultifamily
Energy Usage
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What does this mean in energy costs?
Gas Cost Assumes 1.85/therm
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Bank Buildings - Fuel Costs per Room 2006
Total Buildings 319 0-299 63 300-399 59 400-499
25 500-599 2 600-699 3 700-799 4
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What if we Miscalculate?
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Urban Horizons NYC Recommendations
150,000 Energy Cost SavingsWater Saving Devices New Toilets Lighting
Retrofit Refrigerators Airsealing Ventilation
System New Heat and DHW Systems Combined Heat
Power
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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

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Why Do We Miss All of This Stuff?

• Few pre-design team meetings, if any
• Engineers and architects not talking
• Consultants who dont focus on the building first
• Neglecting to bring management and maintenance
  staff into design meetings
• Lack of pre-CD energy modeling

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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)

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Oh, yeah, HVAC system selection..
Who was it that thought air source heat
pumps were a good idea in Boston?
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Historic Case Study Cambridge, MA
Domestic Hot Water Thermal efficiency
and hot water heating system and reduce hot water
temperature to 120ºF Water Showerheads, faucet
aerators, toilets Ventilation Move thermostatic
controls Test and balance system Windows 1,100
per window replacement not cost-effective
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Historic Case Study Richmond, VA
Lighting 24 Hour Stairwell Lighting Utilize
daylighting or install bilvelel dimming
fixtures Track Lighting in Offices 100W Halogen
Lamps replace with 23W CFL Occupancy sensors in
lounge, meter rooms, refuse closets,
restrooms. Photosensors for outdoor
lighting Health Safety Bulk purchase of green
cleaning products CO detectors in apartments
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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
• Not to mention, maintenance costs and cooling
  load reduction

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Thank You. Comments?