I was surprised by the size although I measured it before the time. I had one concern, the old one was just screwed in place on one side of the beam and then sealed in place with the ceiling finish and this one was bigger and heavier. This concern was gone very quick when I see they included a hanging frame that was adjustable and I could extend it from the current joist to the next one and secure it that way.The whole installation was very quick and well documented (although the font text is small). Set it to max airflow and once all was done, clipped in the face plate, turned on the circuit breaker and flip the switch. Silence.... to only realize it actually has a soft start and running at full speed was so quite you could barely hear it. Checked the flow outside and sure was working great.Way better then the box cutter build engine they had in there. Highly recommend this.