I just saw a video from Tesla on their heat pump for cabin heating. As always, they found a way to reduce the number of parts while making the device more efficient. They have some good engineers on staff!

I have been considering a Ford E transit, and wonder how the heating is in that vehicle? Did they just cheap out and use a resistive heater ? If so, that would sure cut the range in the winter. I would have to consider bringing along a portable power pack in the back of the van and run a resistance room heater instead.