Avoid DUX at all cost.
I am an Electrical Contractor, I purchased this product 13 months ago because it is Australian made. I plead with all potential customers run a mile if someone attempts to sell you a DUX. I'm sorry to say but they are rubbish the thermostats that control the heater element and therefore the water temp will brake seconds after the 12 month warranty on electrical parts expires which means you will have no hot water or 100 degree c. For your kids sake avoid at all costs.
BTW shame on Bunnings for promoting this product.
QLD Electrical contractors Lic 80256