When a building is designed, the maximum expected occupancy is determined to develop settings for outdoor fresh air ventilation required for the building. The use of outside air, needed for fresh air ventilation, can be expensive, due to the heating or cooling requirements of the fresh air on particularly warm or cool days.

When occupancy is at only a fraction of the possible maximum occupancy, the amount of outside air, which is typically at a fixed level, may be 10 times what is needed for the actual occupancy of the building at any given time. The cost of heating or cooling this excessive amount can be significant.

PRODUCT INFORMATION

Product Data Sheet (pdf)

Technical Overview (pdf)

CASE HISTORIES & NEWS REPORTS

Department of Energy Report (pdf)

Seattle Schools (pdf)

Coquitlam School District (pdf)

Department of Energy Report (pdf)

Control to optimize energy use and ventilation - ASHRAE (pdf)

Assessing CO2 control in retfrofits - ASHRAE (pdf)

Proven energy savings - HPAC Engineering (pdf)

Honeywell Report

A CO2 (carbon dioxide) sensing system uses real time CO2 measurements throughout the building to determine actual occupancy continuously during the day. The CO2 system adjusts outside air delivery to provide only the amount of ventilation needed for actual real-time occupancy in the space, thus virtually eliminating 100% of the excessive amount of outside air used in a building.

The result is the elimination of the cost of excessive outside air ventilation.