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Lighting the Path to Energy Efficiency: Changes Proposed for Standard 90.1

Nine addenda are proposed to ANSI/ASHRAE/IESNA Standard 90.1-2007, Energy Standard for Buildings Except Low-Rise Residential Buildings. The addenda are currently open for public review.  Proposed addenda would establish revised lighting power densities for both whole-building and space-by-space compliance methods. The addenda would reduce lighting power allowances in many building and space types while maintaining industry recommended lighting levels as their basis.  Additional proposed daylighting control requirements will also encourage the incorporation of effective daylighting and corresponding electric lighting control into designs, says Eric Richman, chair of the 90.1 lighting subcommittee. To read the addenda or to comment: