ASHRAE 189.1 Is the Most Important Story in Green Building Today

Monday

Mar152010

Monday, March 15, 2010 at 8:26AM

That headline is not linkbaiting either. ASHRAE 189.1 represents the first green building standard written in enforceable code language here in the US. As we highlighted in our podcast over the last two weeks, programs like the Living Building Challenge and LEED will always be there to advance the higher causes of green building and challenge pros to think about how to design and construct our buildings more sustainbly, but the introduction of this kind of code represents a primary shift in the way buildings will be constructed in the US.

If you work in the design/build industry here in the US you are familiar with ASHRAE Standard 90.1, this standard establishes the baseline for energy usage and effieciency here in the US. This standard has become code almost universally across the US...the following paragraph from ASRAE explains the intent of Standard 189.1 (and here's the whole document).

The standard is not a design guide or a rating system, though it is hoped that organizations...will integrate this standard into their rating programs...Standard 189.1 is primarily based on mandatory requirements (with some elements allowing a choice between a prescriptive or performance options for compliance) that establish baseline criteria for a high-performance green building. Also, because Standard 189.1 is a code-intended standard, it references documents that are in normative language, meaning those documents are not just for informative purposes but are required for compliance with the standard.

It's a green building code. How much more effiecient is it that the current building code (ASHRAE 90.1)? Again from ASHRAE:

The U.S. Department of Energy (DOE), through the National Renewable Energy Laboratory, has made a preliminary estimate based on the second public review draft of Standard 189.1. Applying the minimum set of prescriptive recommendations in Standard 189.1 led to site energy savings ranging from 10 percent to 34 percent over Standard 90.1-2007, including plug and process loads and all other energy consumption for the building. The weighted average across all building types was 18 percent. Since the second public review, additional energy savings measures were incorporated into the standard, so the published standard is expected to yield even greater energy savings.

The question now is how rapidly will state and local governments adopt the green building code and make it the law of their respective land? How municipal governments answer that question will rapidly set the baseline for green building in the United States. Have any thoughts? Experience or expertise with the standard? We'd love to hear them in the comments.

James Bedell |

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Reader Comments (57)

Another thing that is set to accelerate the adoption of ASHRAE 189.1 is the International Code Council's new green code, the IGCC. Standard 189.1 is set to be an accepted compliance path for the new green code. This is relevant because of the ICC's wide reached among current municipalities.

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