This is my first post on these, so let me introduce myself. I'm 30 year olds and I work in the HVAC-R industry. I live in Norway, so bear with me on my English, which might be somewhat "off" some places. As we all know, power consumption in all electric appliances equals heat. I know that some of the power will be used to make light as well, depending on the appliance, but of course, all this light will become heat after a little while. I'm having a heated debate with some guy on some site in English, and I am having problems proving this to him. I have given him a few sources, but sources like wikipedia will of course not make him admit he was wrong. (I really don't blame him for this, although on this topic it is accurate.) So what I'm asking here: Since I'm Norwegian, and having a bit of a problem explaining this to him, I ask if you could help me. I need some really reliable sources on this. This would be greatly appreciated.