Why heat or cool your home when it's unoccupied?
Control your environmental systems with more than just the basic programmable thermostat. Have your heating and cooling follow a more dynamic schedule that can be changed with a simple phone call or via a web site.
For example, it's summer and you decide to leave work early. Normally your Air Conditioning would not be set to cool down the house until your normal arrival time. No problem, go to your home's web site and set what you want. No computer or connection? Use any phone to interact with your system via voice menus.
Other environmental parameters that could be controlled in this manner are: Heating, Hot Tub, Pool heater, Electric Hot Water Heater etc...