Re: Duct work
(1) --- that depends on how and what can be done. Though the cost might be prohibitive to alter the ducting. You should have a HVAC professional evaluate the situation and give you recommendations and an estimate.
Originally Posted by Spring Mile
(2) --- no! Smaller duct work will reduce it's function and it's efficiency.
It may be possible to reconfigure the shape to maintain the same volume but have a lower profile. You need a HVAC professional to do this.
(3) -- Usually a bulk head is framed around the duct work with a drop ceiling system installed on the horizontal part of the ceiling --- even the bottom of that bulkhead. The vertical part of the bulk head can be any finish material you wish --- drywall , wood panel , t&g pine , etc.
"" an ounce of perception -- a pound of obscure "