Originally shared by René Jurack
Remember my fast heated bed? ( 1min to 110°C -> https://youtu.be/NzeJseW9LTs )
Now I have a fast hotend, too (50sec to 245°C, 1min to 260°C)!
So, both are ready to print in just a minute. What a good team 
Holy mother of feck. Both Mains driven, I’m taking it?
Nope. Both with 24V. Mains on a hotend is like bicycling on the Autobahn. All fun and laugh till something goes wrong 
Well aye, still there has to someone out there that’s doing it xD So it’s low resistance heaters at 24v.
I switched to 24v recently - most significant improvement I ever made (though I did have to apply the DECAY patch wire hack on my DRV8825s to keep my printer from sounding like a rock tumbler)