We are building a new home. We specifically told the builder we wanted all duct work in the unfinished portion of our basement. We went to check on progress; duct work sticks (framed out) 4 feet by 1 1/2 foot. We have 9 ft ceilings which we would like to keep. Are there any products that could fix this? I don't want a giant soffit around perimeter of room and I don't want to lose my 9ft ceiling. Thanks.