ASHRAE 189.1-2009 and Default constructions

I'm currently working on modeling fenestration for a building that would exist on the 'top' of climate zone 6A. I see that, as with other default constructions, the default external window construction references the ASHRAE 189.1-2009 standards.

So my question is...how exactly does that work? I can't totally tell since the window in question refers to a material called "theoretical glass 2016" and the OS interface reports other variables but not U, SHGC. So...when I see this, should I assume that the object in question is something that just-barely meets the ASHRAE construction standard for the respective climate zone ?

You should be able to find the U, SHGC, etc from the EnergyPlus HTML output. If you are using the OpenStudio Results reporting measure, it's shown by default on the results tab, but there's a dropdown that allows you to select the EnergyPlus output report. It's also available in the model/ folder if you want to open it in your favorite internet browser (helpful for search, copying table, etc).

All default constructions you'll find in OpenStudio that reference a standard implement exactly what the standard says. For example construction named ASHRAE 189.1-2009 ExtWindow ClimateZone 6, means it's the direct implementation of the construction properties listed in standard ASHRAE 189.1-2009 for an exterior window in climate zone 6.

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Julien Marrec

answered 2017-08-08 01:59:30 -0500