Friday, October 4, 2013

Controlling CO2 Levels in Public Spaces

Controlling CO2 Levels in Public Spaces

Researchers at Lawrence Berkeley National Laboratory have determined that moderate to high levels of indoor Carbon Dioxide can impair people's abilities to make decisions.  Levels as low as 1,000 to 2,500 ppm can impede the decision making process.  Levels in a typical classroom frequently exceed 3,000 ppm of CO2.  You can read the LBNL study here.

California's Title 24 requires that CO2 sensors are installed to control demand ventilation in spaces with an occupancy greater than 25 people per 1,000 ft2.  There are many exceptions to Title 24, but the study by LNBL disputes previous studies which began their tests at the 10,000 ppm level, and stresses the importance of delivering fresh air to densely occupied indoor spaces.

Energy ETC has installed many wireless (and wired) CO2 sensors into classrooms, conference rooms, and commercial spaces.  After integrating with the building management system, CO2 levels are kept below 800 ppm by opening fresh air intake dampers that supply the room being monitored.  If levels continue to escalate an alarm is enunciated to alert building maintenance personnel that the system needs to be inspected.

Maximizing indoor air quality while minimizing energy usage is something we understand and believe in.  To learn more about demand ventilation contact us at

Source: LNBL

Wednesday, June 5, 2013

Energy ETC Chosen as Master Integrators for Zero Net Energy Center

San Leandro, California - Energy ETC is very proud to be selected as the master systems integrator for the nation's first commercial building retrofit designed to meet the U.S. Department of Energy's requirement for a "zero net energy" building. The Zero Net Energy Center's advanced building systems will be monitored and automatically controlled by software designed and implemented by the Energy ETC team.
Ribbon Cutting Ceremony With Governor Brown

Our Live Energy Dashboard Tells The Story
In addition to tracking the ZNEC's power generation and usage, the integrated Energy Management System will ensure that all connected building systems work in harmony to exceed the energy conservation goals of the Obama administration's Better Buildings Challenge.

The 46,000 square foot building will use 75% less energy compared to similar existing commercial buildings in the country. Energy ETC's control system will optimize lighting and HVAC systems while taking advantage of natural lighting and automated operable windows for natural ventilation. Constant monitoring of building energy usage will be compared to the power generated by the ZNEC's wind turbines, solar tree, rooftop solar, and thermal solar systems.
The ZNEC will serve as the training facility for over 2,000 electricians in Alameda County. Classrooms will have access to the state-of-the-art control system as part of their curriculum in advanced building controls for renewable and energy efficient systems.
The Zero Net Energy Center
Main Screen of the Energy Dashboard