What is the impact of natural ventilation on indoor comfort and energy use?

Insung Kang - July 15, 2022

Long span (2 minutes)

What is the impact of natural ventilation on indoor comfort and energy use?

Project Location:

Simulation Scale:



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

This case study simulated natural ventilation in a midrise multi-family residential building in Chicago, IL. This study used computational fluid dynamics (CFD) and building energy simulations to explore the feasibility of natural ventilation in the case-study building, during shoulder seasons when natural ventilation is most appropriate. To the end, a parametric study on the energy consumption of the building was conducted to explore different natural ventilation scenarios with various environmental control set-points, compared to a mechanical ventilation system.

What type of graphic is this?

  • Case Study / Multiple

Design Variables

  • Passive strategies

Is this part of the ASHRAE-209 cycle?

  • Cycle 2 Conceptual Design
  • Cycle 6 Design Integration + Optimization
  • Cycle 7 Energy Simulation-Aided Value Engineering

What tools were used for the simulation analysis?

  • Computational Fluid Dynamics
  • OpenStudio

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 methods and the results herein could be used to assess the effectiveness of natural ventilation in a building in the design phase. Future work could systematically explore a larger variety of building types with actual energy consumption data, implement both steady-state and transient CFD simulations with multidirectional and temporal variations, explore buoyancy-driven ventilation, and invest

Is there anything else you would like to mention?

Thank you so much for this opportunity!

Additional credits and other contributors:

Huge thanks to the whole Net-zero energy building design team on this project and Prof. Edoarda Corradi, Dr. Mohammad Heidarinejad, and Dr. Brent Stephens.

Included in the competition: