Previous to this unit I ordered another branded unit that pretty much was in same package but it was labeled as 5-8KW which most likely was a 5kw unit, The other branded unit had a horrid smell when it was on so I returned it and bought this unit instead. All i can say is it is amazing and works much better and hotter, has almost no smell and it even talks when you turn it on and off etc. I love it so far and has about an hour of use with no problems.