Indoor air quality monitoring is the measurement and analysis of air quality inside buildings to ensure healthy indoor environments, occupant well-being, and optimal building performance through real-time monitoring and control. Indoor air quality monitoring is essential for healthy buildings, providing the monitoring solutions that enable occupant well-being and building performance. The Air Quality Monitoring Market was valued at USD 7.23 billion in 2025. These air quality monitoring systems include indoor monitoring solutions. Air quality sensors enable real-time indoor monitoring. Environmental monitoring systems track indoor air quality.

The global indoor air quality monitoring market is characterized by increasing demand for healthy building solutions that support occupant well-being and building performance. By pollutant type, the market includes CO2, VOC, PM2.5, and Humidity monitoring. By technology, the market includes Sensor-Based and Reference-Grade monitoring. Sensor-based monitoring is the fastest-growing segment, enabling continuous monitoring. The market is driven by increasing awareness of indoor air quality, building health certifications, and the need for healthy workplaces. The future of indoor air quality monitoring lies in continued innovation in sensor technology, IoT integration, and building management system integration that enables more comprehensive, intelligent, and health-focused indoor environmental monitoring.