Overall Rating Gold - expired
Overall Score 67.54
Liaison Elizabeth MacKenzie
Submission Date Aug. 8, 2013
Executive Letter Download

STARS v1.2

University of Iowa
OP-T2-13: Timers for Temperature Control

Status Score Responsible Party
Complete 0.25 / 0.25 Liz Christiansen
Director
Office of Sustainability
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Does the institution use timers to regulate temperatures based on occupancy hours in at least one building?:
Yes

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A brief description of the technology used:
The majority of the heating and cooling systems in campus buildings are monitored and controlled by Direct Digital Control “Building Automation Systems” (BAS). The various departments have been polled to determine when the buildings are typically considered to be “unoccupied.” The BAS is then programmed to shut key air handling systems down during the unoccupied periods. The control systems in some of the buildings have been configured to allow occupants that may choose to be in the building during unoccupied periods to turn on the air handling system that serves their particular work zone for a pre-determined period of time. Within the past five years, a number of campus buildings have been retrofitted with electronic occupancy sensors to not only shut lights off automatically but also automatically “reset” the temperature control setpoints in the unoccupied periods. When the BAS detects that the area is unoccupied, the air flow into the space is automatically reduced and the temperature setpoints are also reset (increased during the cooling season and decreased during the heating season) to reduce energy consumption during the times the spaces are unoccupied. The BAS has been programmed to make sure the spaces do not get too cool during the heating season or get too warm during the cooling season.

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The percentage of building space (square footage) with timers for temperature control:
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The website URL where information about the practice is available:
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Data source(s) and notes about the submission:
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