I spoke with the homeowner about what systems she wanted and if she needed duct work. I inspected the system and found that the system is undersized on duct work but there is no room in the utility closet to get more duct work to the system without changing the water heater to a tankless or rebuilding the closet and getting more air to the system. She understood and only wanted to replace the system. We decided to bid a 3.5 ton system for her 1600-1700 sq ft home.