Design and Implementation of a Low-cost CO₂ Monitoring and Control System Prototype to Optimize Ventilation Levels in Closed Spaces

High concentrations ofCO₂ levels are significantly present in closed environments that do not have proper venti-lation. Such high generate negative health con-sequences such as dizziness, headaches and various respiratory problems. For this reason, the design implementation of a low-costCO₂ monitoring control prototype is proposed to optimize ventilation spaces. The parameters device measures concentration carbon dioxide, humidity temperature. A digital PID controller was implemented, with use C++ programming language an exhaust fan stabilize dioxide within space. aforementioned can be viewed two ways: first way locally through LCD screen LED indicators, second one, remotely using free Arduino IoT Cloud platform. environment emulated cardboard box tests it obtained manages keep theCO₂ below established limit. However, further improved by more precise sensors for accurate results. It expected model successfully scaled spaces classrooms offices.