The thermostat serves as the controls of your HVAC system, allowing you to set and adjust desired temperature and humidity levels. There are a wide variety of thermostat options, ranging from basic manual settings, to programmable and WIFI enabled. Some of today’s “smart” thermostats can learn household routines and automatically adjust settings based upon sleep and wake times and whether anyone is home. Some can also monitor air quality and respond to changes by automatically adjusting filtration and air circulation levels. Many can also be monitored and programmed from your smart device or cell phone.