High Performing Buildings - Summer 2012 - (Page 36)

A replacement pier was lengthened to enhance the native eelgrass bed in Port Townsend Bay. The 215 ft pier was constructed for moorage of larger historic vessels, the ability to attract major events, educational opportunities for children through sailing programs, and other hands-on, on-the-water events. © Nic Lehoux for the Miller Hull Partnership BUiLding EnvELopE Roof Type Membrane roo ng and standingseam metal over polyiso insulation, vapor barrier on ½ in. plywood over 2 × 6 wood decking Overall R-value R-30 (nominal), U-value=0.034 (overall assembly) Walls Type 2 x 6 wood frame @16 in. on center Overall R-value R-21 Batts (nominal), U-value=0.057 (overall assembly) Glazing Percentage 29% Basement/Foundation Slab Edge Insulation R-value 2 ft vertical R-10; Slab edge, F=0.54; Floor over livery: R-30, U-value=0.029 Under Slab (Radiant) Insulation R-value R-10 Windows Wood Windows, Low-e2 Argon Glass U-value 0.35 (overall including frame) Solar Heat Gain Coef cient (SHGC) 0.45 Visual Transmittance 0.62 Location Latitude 48°06'58" N Orientation NE-SW design reduces energy use while maintaining high levels of indoor air quality, comfort, and connection to the outdoors. The project saves water and energy by using low-flow plumbing fixtures throughout. Lighting The design capitalizes on building orientation (northeast-southwest), with operable clerestory windows running continuously the lengths of both buildings, spilling daylight throughout the spaces and facilitating natural ventilation. The buildings are programmed to put actively occupied spaces against outside walls to optimize daylighting. The upper level spaces are abundantly daylit due to their orientation and relationship with exterior walls and use of continuous clerestories. Ninety-four percent of regularly occupied spaces have outside views and have daylighting at levels that allow lights to be off during daylight hours. Summer 2012 To ensure even light distribution, meeting rooms and open offices have two running monitor bands. Daylighting controls are used throughout, adjusting artificial lighting as natural light permits. As a cost-saving measure, daylight controls turn lights off by default. When an occupant enters a room, lights are turned on manually, and the controls self adjust the lighting level. Glare is controlled through overhangs and an automatic roller shade system Energy Use An ASHRAE Standard 90.1-1999 Appendix G energy model of the ocean-source geothermal system was provided for documentation of energy savings for utility incentives from Puget Sound Energy (PSE). The building was modeled using eQUEST version 3.56. Ecotope took the PSE incentive model and modified it to meet the requirements of LEED-NC v2.1 EAc1. The project as modeled performed 56% better than the ASHRAE 36 HIGH PERFORMING BUILDINGS

Table of Contents for the Digital Edition of High Performing Buildings - Summer 2012

High Performing Buildings - Summer 2012
Commentary
Contents
High Tech High Chula Vista
Kiowa County Schools
Northwest Maritime Center
La Reunion’s ENERPOS
Wilfred Uytengsu Sr. Center
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High Performing Buildings - Summer 2012