Yeah, he's talking about the 9000 watt heater from Steambrite. It's actually quite good from what I hear, I just can't see spending $1200 on that, when you can get into propane heat for that price.
But, some people don't want the added cost of propane, and you can't take propane in with you on a highrise job.
It has (6) 1500 watt heating elements, 4 put on a 220 volt electric dryer plug, and 2 separate 110 volt plugs. The nice thing about it is even if the custy doesn't have an electric dryer to tap into, you still have the 2 110 volt cords, giving you 3000 watts of heat, which is certainly better than none.
If you did have access to an 220 volt E.D. I would imagine the heat would be quite impressive.