the old NuTone model 696N, 696N-R01 and 696N-R02 with a housing size of 8" X 7.25" (manufactured prior to the year 1999). It does NOT work with current 696N-R03 fans with 7.25" x 7.5" housings. This replacement motor assembly takes 10 minutes or less to install; easily snaps into your existing housing, does not require any wiring.