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Philip Merrill Environmental Center

Completed November 2000
Published June 2001

The Philip Merrill Environmental Center is the first building in the country to receive a Platinum rating from the U.S. Green Building Council's Leadership in Energy & Environmental Design certification program. As the headquarters for the Chesapeake Bay Foundation, the Merrill Center is a 32,000-sf building that may be considered the nation's "greenest" office building.

 

To garner such a prestigious rating, the entire building features systems that make it a global model of energy conservation and sustainable building techniques. The site choice and design of the building supports the Smart Growth programs in Maryland and establishes an example for similar programs in other states. As part of the site redevelopment, materials from previous structures were recycled; for example, concrete from the former foundation was ground up for use as road bedding. The driveway and gravel parking lot are graded to feed runoff into a bio-retention filter and constructed wetlands that remove oil and other vehicle-related toxins in storm water runoff.

More than half of the materials for the project were produced within 300 miles of the facility to reduce transportation-related air pollution. Building beams are parallel-strand lumber, a process which uses strips of sustainably harvested wood that are glued with a low VOC adhesive, pressure molded, and then pre-cut to avoid waste.

Recycled materials in the Center include galvanized steel siding, galvanized roofing, and medium density trim. Salvaged barrel staves from a pickle factory were used to make the sun louvers on the front of the building. Cork flooring (a sustainably harvested product) naturally insulates and dampens sound while providing a cushioned walking surface. Other renewable materials used include cork tackboards, champagne-cork drawer pulls, natural linoleum, and bamboo flooring.

Water conservation efforts begin with waterless composting toilets, a feature of Chesapeake Bay Foundation (CBF) education centers for 20 years. Captured rainwater is reused for all non-potable uses including fire suppression, hand washing, mop sinks, the climate control system, and washing equipment, reducing the need for groundwater from wells or the municipal water system.

Careful siting of the building takes full advantage of the sun for heat and light and the wind for ventilation. A "daylighting" system of windows, blinds, and the sun louvers optimizes shading in the summer and heat in the winter. A total energy management system regulates temperature and opens all windows when conditions are right for natural ventilation. Structurally insulated panels are used in the walls and ceilings. They are stronger for their size than traditional materials and have much higher insulation properties.

Geothermal wells drilled into the earth below the frost line take advantage of the constant temperatures there and assist in cooling the Center during warm weather and heating it in cold weather. Photovoltaic panels on the roof produce renewable electric power. Hot water for the building is generated by roof-mounted solar panels connected to a heat exchanger. All three renewable energy systems provide one-third of the Center's energy needs, and the building uses two-thirds less energy than typical office buildings of the same size. CBF estimates a $50,000 per year savings in utilities as a result of these and other strategies employed throughout the building.

A detailed, CBF-sponsored transportation plan includes incentives for employees to bike to work, to borrow bikes for local errands during the day, and to encourage the use of electric or hybrid vehicles. Showers and lockers are provided for employees who choose to walk, bike, or paddle to work. Additionally, videoconferencing, telecommuting, and other high-tech communication tools help reduce the need for travel to and from the Center for meetings.

Situated on a 31-acre parcel, the building also serves as an environmental education and training center for students and volunteers. The CBF and its volunteers plan to include restoration of the wetlands, forests, and shoreline habitats that are part of the site. Phase II of the project includes a restoration center to provide grow-out facilities and a hands-on training center for restoration volunteers, school students, and teachers.

For more than three decades, CBF has worked to Save the Bay through resource restoration and protection, environmental advocacy, and education. CBF's three main objectives are to reduce pollution, restore habitat, and replenish fish stocks.

Project Information
Building Owner: Chesapeake Bay Foundation
Owner Contact: Chuck Foster, Director of Fleets and Facilities
Building Location: Annapolis, MD UNITED STATES
Project Type: New Construction
Principal Building Function: Office
Project Delivery Method: General Contractor
Project Timeline
Aug 1998Planning Start
Aug 1998Design Start
Oct 1999Construction Start
Nov 2000Target Completion
Project Cost: $11,600,000
Construction Cost: $6,300,000
Cost Per Sq. Ft: $199
About These Cost Figures
Building Information
Project Includes: Headquarters
Total GSF: 32,000
Building Population: 90
People Density: 355 gsf/person
Office Size: 80 NSF
Power Req: 10.2 w/sf Lighting: 1.2 w/sf Appliances & Computers:3.0w/sf Mechanical Systems: 6.0 w/sf
HVAC Req: Primary HVAC system is geothermal closed-loop heat pump system with perimeter baseboard heating. Outside air is supplied to the building?s 18 heat pumps using two packaged desiccant dehumidification/energy recovery units. Eleven percent of the building?s energy consumption is derived by renewable energy sources.
Structure/Foundation: Concrete footings
Project Team
Profile Created 06/01/2001
Last Updated 04/04/2006
About the Reported Cost Figures
The cost figures reported are supplied by the firms that submitted these projects for publication, which in most cases are the designers or builders. Whereas these sources are intimately familiar with their projects, they may not be fully aware of the owners' finally-realized and recorded costs. In some cases, costs are truly and completely accounted for, and in others they represent a near approximation of the final costs. Costs have not been adjusted for year of construction, nor has any attempt been made to make regional cost adjustments.

Further, costs are not comparable on any kind of detailed standard costing model. Hence, it is possible for the cost of one building to include a steam boiler, while the cost of a comparable building might not include the boiler, if steam is being supplied from an already existing campus grid. Or, in another case, a building might include excess boiler capacity to supply steam to another building. Some submittals include fees or unusual site improvements as part of the construction costs, which others do not.
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New Headquarters

The Philip Merrill Environmental Center is the nation's first building to receive the Platinum rating from the LEED Certification Program. It is one of 10 projects to receive the American Institute of Architects' recognition for making sustainable design part of the architecture.

Photo by David Harp, courtesy of Chesapeake Bay Foundation.




Smart Surfacing

The driveway and gravel parking lot are graded to feed runoff into a bioretention structure that treats oil and other vehicle-related toxics in stormwater runoff.

Photo by David Harp, courtesy of Chesapeake Bay Foundation.




Geothermal Pumps

A silica gel desiccant system connected to the geothermal system efficiently removes humidity on hot days.

Photo by David Harp, courtesy of Chesapeake Bay Foundation.




Reusing Rainwater

A catchment system captures rainwater for reuse in fire supression, hand washing, mop sinks, and washing equipment.

Photo by David Harp, courtesy of Chesapeake Bay Foundation.




Daylighting

Open office planning makes the daylighting more uniform and increases the efficiency of both natural and mechanical ventilation.

Photo by David Harp, courtesy of Chesapeake Bay Foundation.

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ISSN: 1096-4894