Standard Test Method for Evaluating CO2 Sensors or Sensor Systems Used in Indoor Applications

Importancia y uso:

5.1 Poor indoor air quality has been implicated in significant adverse acute and chronic impacts on occupant health and performance. The ability to assess the various factors contributing to poor indoor air quality is critical for improving indoor air quality.

5.2 Indoor CO₂ concentrations have long been used as indicators of occupant-related indoor air quality issues, though many such applications of CO₂ reflect misunderstandings of the relationship between CO₂ and indoor air quality, and misinterpretations of measurement results. These CO₂ concentrations are determined primarily by the rate at which occupants generate CO₂ and dilution of CO₂ by ventilation. The impact of CO₂ on occupant health, comfort, and performance, as well as the relationship of indoor CO₂ concentrations to other indoor pollutants has been studied. Monitoring indoor CO₂ concentrations with sensors and sensor systems can be a useful tool in assessing building ventilation and indoor air quality issues related to building occupants.

Note 1: See Guide D6245 and ASHRAE Position Document on Indoor Carbon Dioxide.6

5.3 This test method may be used to evaluate the performance of CO₂ sensors or sensor systems used as occupant or user feedback devices and for CO₂ sensor-facilitated demand control ventilation systems. These devices and systems may improve indoor air quality through dynamic response to CO₂ and pollutant concentrations, as well as increased indoor air quality awareness.

5.4 CO₂ sensors and sensors systems can include components, such as pumps, that cause the sensor or sensor system to sample actively rather than passively. The presence of these components can sometimes vary in impact even between sensors of the same model number. The presence of these components can affect the ability of sensors and sensor systems to measure and respond to changes in CO₂ concentrations. This test method does not evaluate this ability, or lack thereof.

Subcomité:

D22.05

Volúmen:

11.07

Palabras clave:

chamber; CO2; indoor air quality; sensors; sensor systems; ventilation;