I have held off for a long time in adding to this thread but it is bugging me, so here goes.
Power factor.
If you don't use a transformer and you build a furnace around 300 pounds and have to use a 200 amp panel exclusively for it you will have a poer factor of .5 AT THE VERY BEST.
You will end up paying for the transmission of hundreds of amperes even though you limited the voltage to a fraction of the available potential.
It cannot work well in the end and the power bills will be huge.
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