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Standards

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 90.1 - Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 189.1 - Standard for the Design of High-Performance Green Buildings

Lighting (Natural Electrical) CXS

The mission of the Lighting (Natural Electrical) Center of Expertise in Sustainability (CXS) is to provide guidance on how to better utilize daylighting and lighting strategies and technologies to assist with the design and construction of high performance sustainable and energy efficient buildings. Next to heating, ventilation, and air conditioning (HVAC) systems, lighting is the second largest component of a building's energy consumption. Incorporating efficient lighting and daylighting strategies in our facilities will reduce energy consumption. Daylighting and electrical lighting systems are an important part of the building's energy model and must be examined thoroughly during the design process.

The Lighting CXS also provides technical guidance on how to utilize commercially available lighting (daylighting and electrical lighting) software for developing lighting models and simulations to determine the most efficient lighting strategies in achieving a high performance sustainable building.

Contact: Lighting@usace.army.mil

Photos

The project, designed by Seattle District, was accepted by Savannah District as a standard floor plan. The original standard suggested windows on the sidewall, but an analysis proved it more efficient to use prefabricated semi-transparent skylights and sidewall kalwall windows instead.
The project, designed by Seattle District, was accepted by Savannah District as a standard floor plan. The original standard suggested windows on the sidewall, but an analysis proved it more efficient to use prefabricated semi-transparent skylights and sidewall kalwall windows instead.
This building was a design-build project. The architect incorporated the concept of biophilia into the building design that resulted in effective use of daylighting and interior floor plan layouts such that the outdoors could be viewed from any place within the building.
Use of clerestorys in the gymnasium help to promote natural daylight into the space making it more energy efficient by reducing the amount of artificial lighting necessary and also providing psychological benefits to the students resulting in improved performance and less absenteeism.
This project was a in-house design by USACE Seattle District and achieved over a 91% daylighting for their innovative design of a Battalion Headquarters. This project was the first and only waiver given by a Center of Standardization for increased energy performance.
This open office faces south. Horizontal exterior sun shades provide passive sun control. A clearstory above captures northern daylight to maximize consistent daylight throughout the day. The result was a staggering 94% achieved daylghting in this space.
The building envelope controls temperature migration to the interior, with outdoor temperatures from 90 to minus 60 degrees. Building fenestrations designed with an airtight seal use 4-inch deep insulated glazing units with thermal breaks to bring in natural light. Benefits of natural light include reduced patient recovery times and improvements to general health and circadian rhythm.