Sustainability & Historic Preservation Don Hartley, Architect Utah Division of State History

"The Greenest Building is the One Already Built." Carl Elefante

“Sustainable development is the kind of development that meets the needs of the present without compromising the ability of future generations to meet their own needs.” Brundtland Commission (UN) 1987.

The Triple Bottom Line of Sustainability 3-E’s economic ecologicalequity TBLfinancialenvironmentalsocial 3-P’sprofit planet people

Energy Efficiency and Sustainability Factoring embodied energy into the sustainable design equation. Conclusion: “57 Years before any life- cycle energy savings is achieved. ”

Very low energy use buildings (<3.4 Btu/h-ft 2 or 1 watt/ft 2 ) Buildings (or portions of) that are neither heated nor cooled Buildings designated as historic (Section ) IECC Exceptions:

According to the National Trust for Historic Preservation’s Green Lab the most cost-effective investments in energy savings include: Blower-Door and Thermal Imaging tests Insulation in attics (maybe walls) Seal ducts High-Efficiency appliances, water heaters, HVAC equipment Lighting (CFL’s and LED’s) Improve the performance of existing windows

Case Study

Blower-Door and Thermal Imaging Tests

Where does the energy go?

Insulation in attics…

…(maybe walls) Modern construction with vapor barrier Typical historic construction without vapor barrier

Seal Ducts

Radiant Heat (no ducts)

High-Efficiency Appliances in Kitchen and Laundry

High-Efficiency Water Heating

High-Efficiency Evaporative Cooler

Lighting

Improve the performance of existing windows

American Heritage Windows, Salt Lake City

Improve the performance of existing windows

with low-e type window film

Why not replace windows in historic buildings?

Maintenance = Preservation = Sustainabiltiy

Sustainability & Historic Preservation Don Hartley, Architect Utah Division of State History QUESTIONS?