I did the rain sensor one too. It’s a bit loud. I have not experienced it closing without rain but we live in a dry climate. The remote has to be in direct site and we keep the bathroom door closed. But it’s not as loud as the existing fan and of course the wires were right there. I found out some fans are sandwich style and clamp to the roof and some get screwed to the roof top and only trim is installed inside. The original was a sandwich and the replacement screwed to the roof. Not a big deal just a surprise.