Indoor Air Quality Assessment Using a CO2 Monitoring System Based on Internet of Things

  • Gonçalo MarquesEmail author
  • Cristina Roque Ferreira
  • Rui Pitarma
Mobile & Wireless Health
Part of the following topical collections:
  1. Health Information Systems & Technologies


Indoor air quality (IAQ) parameters are not only directly related to occupational health but also have a significant impact on quality of life as people typically spend more than 90% of their time in indoor environments. Although IAQ is not usually monitored, it must be perceived as a relevant issue to follow up for the inhabitants’ well-being and comfort for enhanced living environments and occupational health. Carbon dioxide (CO2) has a substantial influence on public health and can be used as an essential index of IAQ. CO2 levels over 1000 ppm, indicates an indoor air potential problem. Monitoring CO2 concentration in real-time is essential to detect IAQ issues to quickly intervene in the building. The continuous technological advances in several areas such as Ambient Assisted Living and the Internet of Things (IoT) make it possible to build smart objects with significant capabilities for sensing and connecting. This paper presents the iAirCO2 system, a solution for CO2 real-time monitoring based on IoT architecture. The iAirCO2 is composed of a hardware prototype for ambient data collection and a Web and smartphone software for data consulting. In future, it is planned that these data can be accessed by doctors in order to support medical diagnostics. Compared to other solutions, the iAirCO2 is based on open-source technologies, providing a total Wi-Fi system, with several advantages such as its modularity, scalability, low-cost, and easy installation. The results reveal that the system can generate a viable IAQ appraisal, allowing to anticipate technical interventions that contribute to a healthier living environment.


AAL (ambient assisted living) Enhanced living environments Health informatics IAQ (indoor air quality) IoT (internet of things) Smart cities 


Compliance with Ethical Standards

Conflicts of Interest

The authors declare no conflict of interest.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Unit for Inland DevelopmentPolytechnic Institute of GuardaGuardaPortugal
  2. 2.Department of ImagiologyHospital Centre and University of Coimbra (CHUC)CoimbraPortugal

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