reply to kxrm
Re: I think the real concern...
said by kxrm:Not really. You can get an estimate of how much it uses but that estimate is exactly that: an estimate. Your actual usage may vary wildly from that estimate, depending on your lifestyle and other factors.
You can buy an appliance at the store and know fairly quickly and easily how much electricity it consumes.
Verizon at least has provided estimates of the typical data usage for various applications to their customers. They even have a simple to use calculator on their webpage. It's not perfect, but then neither is the energy star label on your hot water heater. The actual energy consumption of that appliance will depend on many factors: How many people live in your house, the temperature of your water supply, the temperature of the room in which the heater is installed, etc, etc.