Neighbors have put in "SpacePak" works okay: expensive, still needed some ugly soffits. Not enough room to snake vents down 2x4 balloon frame.
Two completely new systems have been suggested: One for upstairs and one for downstairs.
1) Isn't it historically "evil" to ditch the radiators (even though we'd love to use the space)?
2) What are our options? Can any of the new technologies (such as gas, evaporative, water coolers) units work in Chicago's climate?