A Wi-Fi thermostat controls the temperature in your home through your smartphone. It allows you to change the temperature of your home from anywhere you have a Wi-Fi connection. You can be on your way to vacation, realize you don’t want your air conditioner maintaining 76 degrees, and set it up to 82 while you are away. On your way home from vacation, you set it back to your normal temperature so it is comfortable when you return home. Many Wi-Fi thermostats give you alerts via text message or email. If a problem occurs with your HVAC system while you are not home to notice and the temperature exceeds a preset range, it will let you know so you take care of the problem right away before any damage occurs to your home.