Lighting the Path to Energy Efficiency: Changes Proposed for Standard 90.1
From green roofs to glazing products, measures to increase energy stringencies are being proposed for major sections of Standard 90.1.
ANSI/ASHRAE/IESNA Standard 90.1-2007, Energy Standard for Buildings Except Low-Rise Residential Buildings, provides minimum requirements for the energy-efficient design of buildings except low-rise residential buildings. Currently, nine proposed addenda to the standard are open for public review.
Proposed addendum by would establish revised lighting power densities for both the whole building and space-by-space compliance methods. The addendum would reduce lighting power allowances in many building and space types while maintaining industry recommended lighting levels as their basis.
“This will encourage designers to use more efficient lighting technology applications that provide more light without using more energy, which will require more thought at the design phase,” said Eric Richman, chair of the 90.1 lighting subcommittee. “Additional proposed daylighting control requirements will also encourage them to incorporate effective daylighting and corresponding electric lighting control into their designs.”
Changes also are being proposed to the envelope section, including addendum f, which sets requirements for high albedo roofs. This proposal recognizes a number of roof construction strategies that result in reduced buildings loads.