It s one thing to blow warm air into a room but cooler air needs to be allowed out of the to make room for the warm stuff.
Moving ductwork from basement to attic.
We went through and moved the ducts over to the edges of the basement since they tended to run right down the middle of the basement ceiling.
All the duct work could be moved to one side of the basement possibly call someone and let him look at it.
Drop sill would be hard to raise.
That drop sill might make it impossible.
You ll need to find a corner such as in a closet to build a duct chase to get ducts from basement to attic.
According to nrel researchers david roberts and jon winkler moving the ducts from a vented attic to a new location inside the conditioned space will reduce electricity used for cooling by 15 to 20 and will reduce the size of the needed air conditioning equipment by 0 5 to 1 ton.
Even more important than that is proper location of the cold air return air ducts.
A drop ceiling could be fasten right below the duct work and that is about as much height as you could get.
I d definitely bring the heat ducts down to the floor.
No thought was given in the basement to duct location.
Is the duct work up aganist the floor joist.