Will be upgrading mobile home furnace to standard furnace and relocating into basement. Will also be upgrading duct work to proper sizing. For proper system functions a new AC is recommended unless customer would just replace current mobile home furnace. Materials: Duct work will be approximately 50 feet in length for main trunk line with 13 6” duct board take offs, approximately 75’ of 6” flex and connecting to existing boots. We will also need to install a return with additional duct board and proper return grate.