Adams Hall Renovation

Adams Hall Renovation

Seth Adams Hall underwent a significant renovation beginning June 2007. Constructed in 1861 to house science laboratories and a new Medical College, the building last saw major work in 1950.  The major renovation project lasted roughly 12 months and was ready for occupancy in July 2008.  Consistent with Bowdoin College's commitment to sustainable building practices and environmental stewardship, the renovation of Adams Hall followed the Bowdoin College Building Design Standards for Renovation Projects which follow the United States Green Building Council's Leadership in Energy and Environmental Design  LEED® construction guidelines. Every effort was made to reuse as much of the existing building and its materials during the planning and construction of the project. New materials were chosen on the basis of embodied energy, recycled content, and contribution to the healthy indoor environment. Mechanical and electrical systems were selected to reduce energy consumptions to the greatest extent possible. The following is a summary of LEED® strategies pursued with the Adams Hall renovation project.

Credits LEED® Category
6 Sustainable Sites
5 Water Efficiency
6 Energy & Atmosphere
6 Materials & Resources
9 Indoor Environmental Quality
32 Total Probable Credit Points

Sustainable Sites

Bicycle racks placed adjacent to the entrance to Adams Hall encourage alternative transportation in order to reduce the environmental impacts of automobile use. The building addition footprint was limited to reduce disturbance to the site. New impervious surface totaled less than 700 square feet.

Points Credit Description Criteria Summary
1 1 Site Selection Avoid wetland, floodplain, wildlife habitat
1 2 Development Density & Community Connectivity
1 4.1 Alternative Transportation: Public Transportation Access Two public bus lines within ¼ mile
1 4.2 Alternative Transportation: Bicycle Storage Provide bike racks
1 4.4 Alternative Transportation: Parking Capacity No parking added as part of this project
1 7.2 Heat Island Effect Solar Reflective Index > 29 for Copper
6 Sustainable Sites Probable Credits

Water Efficiency

Strategies involved in the conservation of water resources for the Adams Hall project followed the USGBC guidelines of installing landscaping that does not require irrigation. By specifying low flow plumbing fixtures that have sensors and automatic controls the use of water is significantly reduced.

Points Credit Description Criteria Summary
1 1.1 Water Efficient Landscaping Reduce by 50% Planters installed with native plants not requiring irrigation
1 1.2 Water Efficient Landscaping No potable use, no irrigation
1 2 Innovative Wastewater Technology Reduce potable water for sewage by 50%
1 3.1 Water Use Reduction 20% Reduction  Install low flow plumbing fixtures
1 3.1 Water Use Reduction 30% Reduction  Install low flow plumbing fixtures
5 Water Efficiency Probable Credit Points

Energy and Atmosphere

New mechanical and electrical systems designed for Adams Hall were optimized to reduce energy demand. High efficiency motors, fans with variable speed drives, increased insulation, zoning of the building, and digital monitoring and control of HVAC systems allow for reduced energy consumption. Bowdoin also replaced the windows with new low E, insulated windows that were designed to match the historic size, shape and character of those being removed. New lighting fixtures use energy efficient lamps. Occupancy sensors that are part of a lighting control system turn off lights in offices and classrooms when not occupied. Natural daylight through existing window openings, new skylights, and from the new addition, reduces the need for artificial lighting. Bowdoin College retained the services of an independent commissioning agent to review design and installation of  mechanical systems as part of the renovation project.

Points Credit Description Criteria Summary
3 1 Optimize Energy Performance Reduce Energy Costs over ASHRAE standards Estimated reduction in energy use over ASHRAE 90.1-2004 by 30%
1 3 Enhanced Mechanical Commissioning Bowdoin hired independent commissioning consultant for design, construction and post occupancy phases
1 4 Enhanced Refrigerant Management HVAC refrigerants limited to non-ozone depleting types
1 5 Measurement and Verification Installed continuous monitoring equipment
6 Energy & Atmosphere Probable Credit Points

Materials and Resources

The most sustainable construction strategy is to reuse what is currently there. The renovation of Adams maintained the entire exterior shell. During construction, the condition of the multiple wythe exterior brick walls was observed to be in poor condition. This necessitated reinforcing at the floor levels and above the arched window openings. The repairs will ensure that the 150 year old structure will continue to serve the college for many years to come.

374 tons of construction wastes and debris were removed from Adams Hall during construction. Of this, 134 tons were sorted for recycling and diverted from landfills.  In addition to preserving and reusing as much of the existing building as possible, new materials were selected that included recycled content, were manufactured regionally, and would be durable and long lasting.

Points Credit Description Criteria Summary
1 1.1 Building Reuse Maintain 75% of Existing Shell Adams Hall retained 100% of the existing shell requiring the structural reinforcement of the existing masonry walls
1 1.2 Building Reuse Maintain 95% of Existing Shell
1 1.3 Building Reuse  Maintain 50% Non-structural interior Existing features and construction of the building were retained whenever possible
1 2.1 Construction Waste Management Divert 50%  374.07 tons total construction waste 72.12 tons of wood and steel recycled 61.89 tons of plaster recycled
1 4.1 Recycled Content 10% (post consumer, ½ pre consumer) See listing below
1 5.1 Regional Materials 10% Regional within 500 mile radius See listing below
6 Materials & Resources Probable Credit Points

Indoor Environmental Quality

In addition to reducing energy use, new mechanical and electrical systems provide occupants with a healthier, more comfortable environment. Two air handling units installed in the basement provide conditioned fresh air to all rooms. A steam-to-hot water heat exchanger supplies perimeter heating during cooler months and can maintain temperatures without running air handlers during unoccupied times. All offices and classrooms are arranged to have operable windows - affording natural light, views to the outdoors, and opportunities for natural ventilation. Glass "borrowed lights" in interior walls provide interior spaces with natural light. Additionally, materials used in the renovation were specified to emit low levels of Volatile Organic Compounds - off gassing that contributes to poor indoor air quality.

Points Credit Description Criteria Summary
1 1 Outdoor Air Delivery Monitoring
1 3.1 Construction IAQ Management Plan During Construction
1 3.2 Construction IAQ Management Plan Before Occupancy As part of the commissioning process, IAQ procedures were followed during and after the construction phase.
1 4.1 Low-Emitting Materials Low VOC paints, sealants and materials were specified for the project.
1 6.1 Controllability of Systems Lighting
1 6.2 Controllability of Systems Thermal Comfort
1 7.1 Thermal Comfort Design
1 8.1 Daylight and Views 75% of Spaces All offices and classrooms have access to an operable window for natural lighting and ventilation
1 8.2 Daylight and Views 90% of Spaces
9 Indoor Environmental Quality Probable Credit Points