Title

Unbalanced Return Air in Commercial Buildings

Secondary Author(s)

Cummings, James

Report Number

FSEC-RR-139-06

URL

http://publications.energyresearch.ucf.edu/wp-content/uploads/2018/06/FSEC-RR-139-06.pdf

Keywords

Ducts; Buildings

Abstract

Research in 88 central Florida commercial buildings during the last decade has found that 26% of the air distribution systems had substantially unbalanced return air. Unbalanced return air occurs when there is a restriction to air flow between the supply discharge and the return air, creating positive and negative pressure fields throughout the building. Severe consequences in commercial buildings can occur as a result of unbalanced air flows. This paper examines unbalanced return air and its consequences in three commercial buildings, and explains why balancing air flow in buildings is a critical part of maintaining a healthy and energy efficient building.

Date Published

1-1-2006

Subjects

Buildings - Ducts

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