What is the impact of Window Performance on EUI?

Bilal Maarouf - March 23, 2021

Medium span (30 seconds)

What is the impact of Window Performance on EUI?

What is this graphic showing? Describe the different parts of the graphic and how it communicates the data.

For a MURB building in cold climate zone 7, it's evident that at some SHGC and Window R-value, it's more beneficial to have additional glazing than having less glazing.


  • EUI (Energy Use Intensity)
  • Glazing Fraction/Window to Wall ratio

Is this part of the ASHRAE-209 cycle?

  • Cycle 2 Conceptual Design

What tools were used for the simulation analysis?

  • OpenStudio + Eplus

What tools did you use to create the graphic?

  • PowerPoint

What was successful and/or unique about the graphic in how it communicates information?

The counter-intuitive idea that more of something bad (glazing) can actually be good (less EUI)

Is there anything else you would like to mention?