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2024 April In-Person Meeting

April 11 @ 5:00 pm - 9:00 pm

How Tall Can We build? Climatic Impact on Internal Pressures of Mega-tall Building

Presented by: Mehdi Jalayerian, PE,  Senior Principal, ESD now Stantec Consulting Services Inc.

The climatic conditions at the top of a very tall building are cooler and drier than those at grade. While standard equations exist to describe upper-level climatic conditions for buildings, the global variation can be significant and local profile data should be utilized to estimate upper-level climatic conditions. Localized climatic conditions such as wind and temperature impact uncontrolled air movement into and out of a tall building due to wind forces on building envelop and air buoyancy caused by indoor/outdoor temperature difference. The uncontrolled air movement or uncontrolled internal pressure difference significantly impact the performance of HVAC and life safety pressurization systems and will impact building energy performance specially in harsh climatic conditions. This presentation discusses the internal pressure variation in mega-tall building and its impacts on building HVAC system design, operation and energy performance and provides strategies to mitigate and manage such impacts. The financial impact of building operation and its energy performance and disruptive risks of uncontrolled internal building pressure can be effectively mitigated if analyzed holistically and addressed early in the design of tall towers.
Learning Objectives:
1. Describe climatic temperature and pressure impact on tall buildings.
2. Understand internal building pressure variations and its impact in Tall Building and describe the specific steps to mitigate it.
3.Understand the uncontrolled internal building pressure impact on HVAC system design, operation, and energy performance.
4. Understand uncontrolled air movements due to pressure in tall buildings how to mitigate such problems.

This meeting will take place at:


350 W Wolff Point Plaza
15th Floor,
Chicago, IL 60654

The committee meeting will start at the usual time 5:00 pm in the Waterview Lounge with drinks and appetizers. At 6:00 pm we will adjourn to the LaSalle Room for our business meeting and technical presentation.

Do you have a program you would like to share with the committee, please feel free to reach out to our program coordinator at jose.estrada@clarkdietrich.com


April 11
5:00 pm - 9:00 pm
Event Category:




Waterview at Wolff Point Plaza
350 W Wolf Point Plaza 15th Floor,
Chicago, IL 60654 United States
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