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Demand-Controlled Ventilation Case Study
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The Indoor Air Quality
Indoor air quality is considered by many to be as important as energy conservation. Some public schools, universities, and businesses believe it is imperative to assure that the air quality is maintained to help allow peak performance of the occupants.

Harley Davidson - includes visual displays that allow employees to track indoor air quality.
Purdue University - uses CO2 sensors to maintain maximum ventilation during peak daytime lectures, but also allowing a reduction of ventilation during lighter evening lectures.
Apartment Ventilation - A test of user versus automatic control of ventilation was conducted in Finland. Two apartment flats were built. One had manual control of ventilation and the other had demand-controlled ventilation. The preliminary results showed that ventilation was improved with automatic control.
The Energy Management element to Demand-Controlled Ventilation
LaSalle Plaza - an office complex with a wide diversity of tenant uses can change characteristics over time. DCV manages the changes automatically.
Oregon Convention Center - The new expansion of the convention center in Portland, Oregon is using CO2 sensors to manage the widely varying ventilation needs of convention participants. There are 34 sensors located in the HVAC system ducts to allow customized ventilation for different zones in the facility.
Fisher Pavillion - This exhibition hall in Seattle, Washington, used many progressive building techniques in addition to demand-controlled ventilation. The result is that this building achieved a LEED Silver rating.
Theoretical Case Study - Researchers have conducted studies that look at the theoretical energy savings for different systems and locations. One study, conducted by Brandemuehl and Braun, included the effects of DCV, economizers, and enthalpy control, and evaluated the results based on the temperatures at 20 locations across the country. The study indicated that savings were possible in most cases and improper system design might cause energy use increases.
DCV Guide:
DCV Systems and ASHRAE
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