CO2 Sensor for HVAC SYSTEM

Featured Product from Cubic Sensor and Instrument Co.,Ltd.


  •  Almost 40% of total energy consumption in the U.S. is used in buildings (DOE, 2007).
  • Typical buildings consume 20% more energy than necessary (CEC, 2002).
  • Fortunately, the opportunities to reduce building energy consumption are significant (Sun et al, 2006).

Carbon-dioxide sensors are widely used as part of a demand controlled ventilation (DCV) system for buildings requiring mechanical ventilation to monitor indoor air CO2 concentration and to control the outdoor air intake rate to maintain indoor air quality (IAQ). Controlling ventilation air flow rates using CO2-based demand controlled ventilation (DCV) offers the possibility of reducing the energy penalty associated with over-ventilation during periods of low occupancy. But performance of CO2 sensors can significantly impact energy use as well as IAQ in these buildings. And overestimation of the CO2 concentration by the sensors will lead to increased outdoor air usage causing increased energy cost. Underestimation may lead to poor IAQ and Sick Building Syndrome (SBS).

There are different methods to bring fresh air into a building. One way is to continually pump air in, which can run up high energy costs. A more energy and cost-effective method is to pump air in intermittently, only when it is needed. This can be done by using CO2 sensors within the HVAC system, and Cubic CO2 sensor be widely used in the monitor and detector to helps achieve the energy saving and higher the comfort of indoor.

 Here’s how it works: when enough people enter a room, the CO2 level rises.

The HVAC system responds by opening dampers, which allows fresh air in. When the people leave, the CO2 level drops, and the fresh air dampers are closed. Generally, 400 to 1000ppm is normal for inside an occupied building; when the level goes over 1000ppm, you can get complaints of drowsiness and poor air.

Cubic CO2 sensor CM1106-C is a commonly used sensor and is preset at 0 to 2000ppm and can be adjusted to a different range(Extending to 5000ppm. 10000ppm). Its be widely used to monitor, detect and control the air quality devices or controllers.

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