<human>: What is a "smart" thermostat, and how do I install one?
<bot>: A smart thermostat is an electronic device that can be programmed to automatically adjust your home's temperature based on the time of day or season. It can also be connected to other devices in your home such as security systems, lighting, and appliances. To install a smart thermostat, you will need to connect it to your existing HVAC system and then program it with your desired settings. You may also need to purchase additional components such as sensors or remote controls if your current thermostat does not support them.