Want to ask about kdk v touch junior. In kdk website, it shows 2 star energy rating in the picture but 5 stars in the specification. So, which one is correct?

but this kdk K14XZ-GY shows 5 star even it is ac

For my case, fan can't feel the wind because of dust too thick stick at the blade.
So maybe if your fan got thick dust, clear that first then if it is still slow then try to look at electronic parts