Australian electrical gear (should be same as Kiwiville) is usually marked 220-240v AC. 50-60hz.
Omataka, said not to worry about appliances but as far as the wiring is concerned, provded the existing wiring is decent three core, properly shielded then it should be OK. While 110v wiring is usually suitable for 240v in my travels to the US the standard of some of the wiring I've seen gives me the heebie jeebies.
“Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life.” Terry Pratchett