"Zephyr" an address @ some place .com wrote in message
. ..


"I don't know, We've done geo therm before and never had to put in new
wire, but, I don't know everything"


The question to DTE is irrelevant that it is goethermal. The question to
them is can you upgrade the service to 400 amps without changing the wiring?
They for sure should be able to tell you this.

As an aside, do you think the geothermal system will really save you any
money in the long run? What about when you factor in what sounds like a
sizable hike to your electric bill?

If you do the geothermal, I would be interested to read about your
experiences with it as it is an interesting technology.