No... the existing ductwork has cold-air returns and all that good stuff.
What I was saying is that we never had central AC up until now. Everything
checks out - they did a good install (I kept an eye on them - had um
"projects" to do in the basement that day while they were working). :-)

These statements disturb me about yoour installer.
No previous A/C and you didn't need at least a
couple of returns? I guess you won't notice you
need them if you don't use the A/C.