189.1 was jointly created by ASHRAE, the U.S. Green Building Council, and the Illuminating Engineering Society of North America. Like its 2009 predecessor, the 2011 version of the standard is written in code-intended (mandatory and enforceable) language so that it may be readily referenced or adopted by enforcement authorities to specify the minimum acceptable level of design criteria specifically for high-performance green buildings.
v2014 Proposed Changes
v2014 of the sustainability standard, 189.1, is currently under development. It is scheduled to be published sometime late in 2014, at which point it becomes available to be adopted by states and other jurisdictions.
Proposed Addenda to 189.1
The follow lighting-related addenda are in various stages of the approval process and may or may not actually end up in the 2014 standard. The more substantial addenda have been bolded.
Addendum X - the BUG tables from 2009 have been corrected to match the MLO tables
Addendum M - This addendum adds lighting quality requirements to the Indoor Environmental Quality section of Standard 189.1, recognizing that following good lighting practices is part of creating a high-performance building where occupants will be productive, comfortable, safe, and healthy. Control of lighting to suit individual or group needs, in particular, has been shown to increase comfort, satisfaction, and productivity of the people in the space. Likewise, the productivity, and therefore the long term sustainability of an enterprise, suffers when presentation lighting cannot be controlled to the correct level and uniformity of illuminance. While energy savings may very well be a side result of these provisions, they are specifically written to enhance the lighting quality of the subject spaces.
Low Mercury Lamps
Addendum O - This addendum adds a new mandatory provision to Section 9 The Building’s Impact on the Atmosphere, Materials, and Resources, establishing maximum mercury content levels for certain types of electric lamps. The requirements are consistent with a new law in the State of Oregon governing the sale of electric lamps.
Addendum AA - an overhaul of the daylighting requirements in IEQ
- The mandatory daylighting section has been moved to the prescriptive section to allow for the alternative of using the performance path to show equivalent daylighting benefits.
- When relatively large spaces with high ceilings are directly under a roof it is cost-effective to daylight them with skylights and it is reasonable to daylight at least half of the area of the space. This addendum provides more flexibility in achieving minimum daylight requirements and the addendum adds occupancy exceptions to the requirement for diffusing glazing. The rationale of Section 188.8.131.52(c) is to assure that surfaces in the daylight are highly reflective. Surface reflectance impacts the perception of the brightness of a space. However, based on user comments, some surface reflectance has been modified and clarity added to the language. Also, guidance has been provided regarding test standards and surface reflectance.
- The performance option (8.5.1) has been modified to more clearly align with the proposed
- References have been added to the informative Appendix G.
- Corresponding references to the sections modified by this proposal have been updated.
Addendum AG - brings the daylight related definitions in 189.1 into alignment with 90.1