High Performing Buildings - Summer 2012 - (Page 40)

Oversized custom wood and glass doors are opened throughout the shoulder seasons and summer, providing natural ventilation. FSC-certi ed wood was sourced for glu-lam framing, structural decking, wood paneling, millwork, casework, and nish deck. Wood materials were analyzed for cost and regional availability whenever possible. Additional source specific exhaust is provided for the boat building shop and the kitchen space. In both cases, variable speed exhaust fans and makeup air ducts are provided. Operations and Maintenance The titanium heat exchanger plates hold up significantly better than stainless steel in the salt water environment. Locating the plates in deep water 12–15 ft below the lowest tide line ensures minimal marine growth. The heat exchanger plates are constructed with 2 ft spacing between the plates, allowing divers to remove any growth that may occur and clean the plates as necessary to maintain heat exchange efficiency. The indoor heat pumps are grouped together in mechanical mezzanine areas in each building for centralized maintenance access. Since the non-profit NWMC organization does not have a full-time maintenance or operations person, simple thermostat controls are available to the building users to provide control of thermal comfort. © Nic Lehoux for the Miller Hull Partnership R E d u C i n g E n v i R O n M E n ta l i M pa C t Cost Effectiveness The NWMC building saves approximately $29,000/year in electric bills compared to the LEED base case building, and performs 59% better than an area-weighted average CBECS baseline. The project met Puget Sound Energy’s (PSE) prescriptive incentive requirements for 40 HIGH PERFORMING To reduce impacts to one of the Puget Sound’s endangered eelgrass beds, the new pier is designed to maximize light to the bay’s oor by reducing the effective shadow width from the overwater structure and provide re ective panels under the solid sections. The project’s titanium heat exchanger plates are located at the end of the pier, beyond the sensitive eelgrass habitat. Summer 2012 BUILDINGS

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High Performing Buildings - Summer 2012
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High Performing Buildings - Summer 2012