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地址: Annapolis, MD 

建筑面积: 2,970 sq. meters

竣工日期: December 2000

高度: 2-story building 

场地选择: The building was sited in a manner consistent with Maryland's Smart Growth criteria, on the footprint of the existing buildings. Some existing pavement was removed as parking space was moved underground, resulting in an increase in pervious surface.

Native landscaping is important to the organization, and habitats ranging from wetlands to an oyster reef are currently being restored on-site.

Efforts were made through landscaping and exterior material choices to minimize the heat island potential of the project. Additionally, light pollution is minimized by the use of timers on exterior lights.

能源利用: Energy issues were considered in the design of the Headquarters. The building was sited in order to take advantage of southern solar exposure as well as prevailing winds for natural ventilation. Daylighting is emphasized by large windows, clerestories, and an open interior design.

The south wall of the center uses photovoltaic panels to produce energy on-site. Solar panels on the roof heat water for indoor use. Geothermal wells are used for heating in the winter and cooling in the summer.

A sophisticated total energy management system monitors and controls energy use in the building. The system alerts employees when windows should be opened. Other windows are opened and closed automatically. The system also monitors daylight levels, adjusting electric lighting as needed.

节水方案: The center employs composting toilets in place of conventional flush toilets. When combined with other water-efficient appliances and native landscaping, the result is a 90+% reduction in water use over an otherwise comparable conventional office building.

The center captures and reuses rainwater and uses a bioretention filter to treat oil and other pollutants in runoff from the pervious parking area. 

材料选择: In construction, the building incorporated a "cradle-to-cradle" rather than "cradle-to-grave" philosophy. This philosophy requires consideration of all materials not only for what they are made of, but what they can be made into at the end of their useful lives.

All existing structures on the construction site were recycled (concrete from original foundations is now being used as road bed fill, for example). Materials were selected for recycled content (galvanized siding made from cans, cars, and guns; interior fabrics; and rubber flooring). Likewise, materials from renewable or regenerable resources were incorporated (cork flooring comes from the bark of the cork oak tree which can be harvested without killing the tree and regenerates in 7 to 9 years). All wood was from renewable resources (the main foyer's bamboo flooring is harvested from plants that regrow in approximately 3 years).

Roof and wall enclosures use Structurally Insulated Panels (SIPS). These use high R-value insulating foam in place of conventional wood studs and rafters, resulting in a high performance building envelope using a fraction of the wood of conventionally framed structures. Parallel strand timber beams from new growth trees, harvested and quickly regenerated, provide timber stronger than conventional wood. More than 50 percent of the building materials came from a 300-mile radius to reduce environmental costs associated with travel.

Diversion of Construction & Demolition Waste

Existing structures on the site were deconstructed rather than demolished and all materials were auctioned, salvaged, or recycled. The existing foundations were chipped and used as road base. Seven loads of chipped concrete were hauled off-site to be reused. With regard to construction waste, all cardboard, metals, concrete, cmu, asphalt, and land-clearing debris were recycled.

室内环境品质: Natural ventilation is used whenever possible, made more effective by a carbon dioxide monitor and automatically controlled operable windows. Additionally, efforts were made to limit the amount of toxic materials introduced to the indoor environment in the first place. VOC-free paints joined natural materials such as cork, linoleum, and bamboo in an effort to create a healthy working environment.

The building design incorporates extensive daylighting and appropriate shading as well as views of the Chesapeake Bay to maximize the visual comfort of employees.

Green Strategies

Entry of Pollutants

Design entry to facilitate removal of dirt before entering building

Avoid carpet and other hard-to-clean floor surfaces near entry

Visual Comfort and Interior Design

Design open floor plans to allow exterior daylight to penetrate to the interior

Ventilation and Filtration Systems

Provide occupants with access to operable windows

Below Grade Rainwater and Groundwater

Raise the building up on piers

Reduction of Indoor Pollutants

Use only very low or no-VOC paints

Specify prefinished wood or bamboo flooring

Avoid wood products made with urea-formaldehyde binder

Building Commissioning for IEQ

Use a comprehensive commissioning process to ensure that design intent is realized

Maintenance for IEQ

Design isolated storage closet for cleaning and maintenance products