What do I need to power a 110v Instant Water Heater in Aus?

Saturday, October 24th, 2009 at 2:47 pm

It's detailed as 4kw and 110v - these are all the specs available to me.
Am I correct in thinking this will pull 4000w? (That's huge!!).
Considering it will only be used for short showers by me a few times a week, can I get away with a less robust step down transformer?