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

The Greening of Historic Preservation: Keeping the “Green” in Our Pockets. Presented by: Ryan Merkin Steven Winter Associates. IPED National Historic Tax Credit Conference November 8, 2007 Washington, DC. Steven Winter Associates,Inc. Building Systems Consultants - Founded 1972

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

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  1. The Greening of Historic Preservation:Keeping the “Green” in Our Pockets Presented by: Ryan Merkin Steven Winter Associates IPED National Historic Tax Credit Conference November 8, 2007 Washington, DC

  2. 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

  3. 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

  4. Energy Costs in Historic Preservation: How Much our Buildings Use and Why

  5. 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

  6. A Top 10 Owner of NYC Properties:Multifamily Energy Usage

  7. What does this mean in energy costs? Gas Cost Assumes $1.85/therm

  8. Fuel Cost/Room ($) Gas Oil Dual Bank Buildings - Fuel Costs per Room 2006 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

  9. What if we Miscalculate?

  10. 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

  11. 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

  12. 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

  13. 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)

  14. Oh, yeah, HVAC system selection…….. Who was it that thought air source heat pumps were a good idea in Boston?

  15. Historic Case Study: Cambridge, MA Domestic Hot Water Thermal efficiency <65% Retrofit high efficiency combined heating 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

  16. 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

  17. 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…

  18. Thank You.Comments?

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