WOW, how warm does a F 250 6.7 block heater get?

Grit dog wrote:
Fish, I didn't know that. Heat element in the hvac? So instant warm defrosters with a cold engine?
That's cool!
But it's an option, not standard? (I don't recall noticing it in the newer psd trucks I've driven in winter .)

It is an option. It is called "Rapid Supplemental Heater." It will not burn you up, but you don't have to wait for some heat. Most dealers around here put it on the King Ranch and Platinum trims they order.