That much heat in such a small package is a recipe for disaster... FIRE.
With that said, the only way to get what you want would be to design it to plug into a 4-wire dryer receptical. These provide 120/240v at 30 A. This is assuming that such a device would be portable and cord & plug connected. If hard wired, then obviously this wouldn't apply.
But I stil maintain (and I bet most would agree) that is a fire risk. Even 1kW or 1.5kW electric heaters are a risk, so I seriously think if anyone needs any more portable heat than than that, they should seriously talk to an HVAC contractor and get their household heating beefed up through better central heating.
[This message has been edited by jdadamo (edited 03-25-2005).]