Thermostats have indeed evolved significantly from basic temperature controllers to sophisticated smart BMS thermostat, integrating a variety of sensors and advanced algorithms to optimize not only temperature but also air quality, energy efficiency, and overall comfort. Today, smart thermostats are equipped with CO2 and humidity sensors, transforming the way we manage indoor environments.   In early days,FCU thermostats were simple mechanical devices that controlled temperature based on a fixed setting. They were often unreliable and inefficient, requiring manual adjustments to maintain comfort.   Then,digital programmable FCU thermostat and wifi fan coil thermostat became common, offering users more flexibility and convenience. However, today’s smart digital thermostats go beyond just controlling temperature. They now incorporate advanced CO2 and humidity sensors, marking a major shift in how we manage indoor climates.   Thermostats with CO2 Sensors for Air Quality. CO2 sensors measure carbon dioxide levels, which can rise significantly in enclosed spaces with high occupancy. Elevated CO2 levels can lead to discomfort, fatigue, and reduced cognitive function. Smart thermostats equipped with CO2 sensors can adjust ventilation or air circulation in real-time, maintaining optimal indoor air quality and ensuring a more comfortable and healthy environment for occupants. Thermostats with Humidity Sensors for Comfort. Humidity plays a crucial role in indoor comfort and health. Excessive humidity can cause mold growth and discomfort, while low humidity can lead to dry skin and respiratory issues. By incorporating humidity sensors, smart thermostats can regulate moisture levels, ensuring the ideal balance to create a comfortable and healthy indoor environment.   As the demand for energy-efficient and sustainable solutions grows, smart thermostats for fan coil units (FCUs) are becoming increasingly relevant in modern building management systems.