Measurement and Performance Evaluation of an IoT-Integrated Dehumidification Control System for Airborne Infection Isolation Rooms: A Case Study at Betong Hospital

This study presents the measurement, and performance evaluation of an IoT-integrated humidity control system for airborne infection isolation rooms (AIIRs), developed in accordance with ASHRAE Standard 170.The system features two silica gel panels that operate alternately between dehumidification and regeneration, allowing continuous and efficient humidity regulation.Environmental monitoring is carried out using a BME280 sensor and an ESP32 microcontroller, providing real-time measurements of temperature and relative humidity.Data are transmitted to Google Firebase and Sheets for cloud-based storage, analysis, and visualization, and are used to assess system performance.A notification system with a front display and smartphone application alerts users when environmental conditions exceed acceptable thresholds.Experimental results show that the system maintained an average temperature of 22.63 and relative humidity at 54.37% RH, both within recommended limits for infection control.The humidity ratio was 0.00882 kg/kgda, below the ASHRAE threshold of 0.012 kg/kgda.Each silica gel panel sustained RH below 60% for approximately 1.3 hours and was fully regenerated at 100 within 55 minutes.Overall, the system demonstrates reliable, real-time environmental control and offers a cost-effective solution for enhancing indoor air quality and strengthening safety for both patients and healthcare personnel in airborne infection isolation rooms.