Lots of Australian electricity comes from coal (about 60%).
I live in the ACT so its 100% renewable. We also recently put 6.5kw of solar on the roof so most of our daytime power is self generated. (I was against the rooftop solar but my partner insisted, it makes no sense economically or environmentally.)
Resistive
I bought 4 Nobos. They are clean, quiet, fast enough, and best of all have a "lifetime warranty" that I plan to make use of when they die.
https://www.nobo.com.au/en-au
What am I missing? These things just look like fancy resistance heaters, exactly the same efficiency as a $15 space heater (significantly less efficient than a heat pump).
No they are not efficient, but my power is almost free, and renewable. Heat pump hardware is very expensive and not as flexible.