Copy "faces"

Hi,

what is the easiest way to copy a “face” over another?
I look for somethink like the inset tool, but not create just new faces, it would insert a copied selection.

For example if i constructed a hotel building, and i have a “face” with windows and other details on it and want to place it on an other “face”, which is the best way for that? Perhaps a tool for that exists?

greets
Rigoletto

select face press Shift-d(duplicate) then zero key then enter

Face placed on another cause render go bad. Better idea is to duplicate and snap it into free space or use Array modifier on such wall block object for more repetitions.