Sustainability &Historic Preservation

Don Hartley, ArchitectUtah Division of State History

dhartley@utah.gov

"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 ecological equity

TBL financial environmental social

3-P’s profit planet people

Energy Efficiency and Sustainability• Factoring embodied energy intothe sustainable design equation.

Conclusion:“57 Years before any life-cycle energy savings is achieved.”

• Very low energy use buildings (<3.4 Btu/h-ft2 or 1 watt/ft2)

• Buildings (or portions of) that are neither heated nor cooled

• Buildings designated as historic (Section 101.4.2.3)

IECC Exceptions: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 withvapor barrier

Typical historic constructionwithout vapor barrier

Seal Ducts

Radiant Heat (no ducts)

High-Efficiency Appliances in Kitchen and Laundry

High-Efficiency Water Heating

High-Efficiency Evaporative Cooler

High-Efficiency Evaporative Cooler

High-Efficiency Evaporative Cooler

High-Efficiency Evaporative Cooler

Lighting

Improve the performance of existing windows

Improve the performance of existing windows

Improve the performance of existing windows

American Heritage Windows, Salt Lake City www.vintagewindows.com/

Improve the performance of existing windows

Improve the performance of existing windowswith low-e type window film

Why not replace windows in historic buildings?

Why not replace windows in historic buildings?

Maintenance = Preservation = Sustainabiltiy

Sustainability &Historic Preservation

Don Hartley, ArchitectUtah Division of State History

dhartley@utah.gov

QUESTIONS?