Moving the range but reusing the hood ducting
Our plans include moving our range about 6 feet. We're eliminating the wall it's on and moving it to a side wall. Neither wall is exterior; as far as we know the vent from the current hood goes through the roof of our single story house.
We're early in the process, no actual Plans with a capital P yet. Had one contractor come out to give us a ballpark on some things, and on the hood/vent issue, he said he'd be able to use the same through-the-roof vent hole/connect to the same ducting as our existing range hood.
Reality check on this? What will we need to know about our current ducting before we can make a choice on a new hood or whether it's possible to reuse the ducting?