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gbXML is an industry-supported schema for sharing building information between disparate building design software tools.

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Explain the “Zone” element

The gbXML "Zone" element describes an HVAC zone that encompasses one or more building spaces and includes all necessary child elements to describe a typical HVAC zone. These child elements include information about air flow rates, cooling and heating design set...

Explain the “Results” element

Not only does gbXML describe building geometry, zoning, envelope components and HVAC systems for buildings, but it also allows a building analysis software tool to store its calculated results in the same gbXML file that was originally imported. The "Results" element...

Overview of gbXML’s Role in Interoperability

The URL below links to a slide deck that was presented at the ASHRAE Summer Meeting in St. Louis, MO in June 2016. It was part of a seminar talking about BIM and HVAC system design. This slide deck includes information about the role that gbXML plays in...

What are “air walls” in gbXML?

The Surface element defines the boundaries of a space or zone. In most cases, a surface will be an opaque construction such as a wall, roof, ceiling, floor, and more. Sometimes a large space needs to be zoned into separate "HVAC zones" for purposes of modeling a VAV...

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