Revision history [back]

The older version of the Add Wind and Stack Open Area applied a default 0.7 m2 operable window area to any zone with an exterior wall, regardless of whether it had windows. I've updated the measure and it now asks for an operable window construction and calculates window area directly from the window geometry.

Note that while OpenStudio subsurfaces can have a FixedWindow orOperableWindow subsurface type, this distinction does not carry into EnergyPlus which treats all windows as a FenestrationSurface:Detailed. This EnergyPlus object does not have a subsurface type, so you need to specify a construction to let the measure know which windows are operable.

Measure Updates:

• Changed inputs to have user selected an open area fraction schedule
• Changed inputs to have user select an operable window construction
• Measure now adds ZoneVentilation:WindandStackOpenArea objects per window instead of per zone
• Measure now calculates operable area based on window geometry
• Measure now calculates effective angle based on the surface normal of a given window
• Measure now calculates height difference to neutral pressure level as half window height