WhisperSense DC fan-LED Lights Motion and Humidity Sensors Delay Timer Pick-A-Flow Speed Selector 50, 80 or 110 CFM

It’s a great product. Much quieter indeed. Wish the price was lower. Settled with the basic model with same noise level. Its never was will never be a non-attic access required installation. Unless you had an existing installation and you’re replacing the fan assembly unit (removable) 4” diameter pipe venting default. It is still worth the extra effort and money well spent. DIY.

Replaced an smaller existing fan with this Panasonic. First off if your doing a “old construction” installation do yourself a favor and throw away those Easy Fit brackets and just use some 1/4 x 3” wood to “frame” the sheet rock. See pics - Supports it fine. I did the original installation reusing the flexible foil duct. After it was installed it wasn’t exactly “whisper” quite so I took it down and replaced with semi rigid aluminum duct work and made it much quieter although not quite Whisper quite on 80 CFM.... All in all a good fan, only up for a week. Humidity sensor works well - will have to see how it works in the summer on warm days ( I have the fan wall switch “on” all the time, if it comes on on humid days I can just turn it off manually. A few negatives- motion sensor CANNOT be turned off. I did not use the night light so I just taped over the sensor and attached it back in the housing. You would think this could be turned off or better yet tie it to The night light which would be useful at night. Also the plastic fan cover is a little cheap looking for a $300 fan although the spring clips are handy when adjusting time or humidity levels.

Fan does an excellent job taking humidity out of the bathroom. However, the instructions are terrible. Took me twice as long to install because of the poor instruction manuel.

Nice unit – a few things to look out for and/or be aware of. Took me about 4 hours to replace the old upstairs bathroom fan unit that had been installed when the house was built. Luckily, I did have access through the attic, as the original fan had obviously been installed and SECURELY SECURED from the top as the house was being built, with zero thought of how it might be replaced from below the ceiling in future years. If I’d not had that access, I really don’t know how I would have got it out … The installation instructions are not the best – read them carefully once – and then again! Since I had top access, I was able to lay the Flex-Z Fast bracket on top of the ceiling sheet rock, extend it out between two joists, and then attempt to secure it to the joists using the provided tapping screws. The first two screws went in easily – the second two got half way in before the heads stripped – both ways. I should have known better when I looked at the screw heads – the recess to accommodate the screw driver was small and shallow. Basically, cheap soft screws. So – either drill a hole before using these screws, or replace them with some decent screws. I never managed to get those two screws out, but did then drive two more screws through the bracket into the joist. (You can just see one of the “extra” screws to the right of the drain pipe at the bottom right corner of the picture “Attic View”). Because of the direction that my ducting had to run in relation to the Flex-Z Fast bracket, I actually installed the fan at 90 degrees to how is detailed in the instructions (Fig 4 of “New Construction”). I don’t think this is a problem – the flanges on the unit accommodate that option. But what that does mean is that I couldn’t then install and secure the adaptor to the Flex-Z Fast bracket per the instructions (Step 6 of “New Construction”). You can see what I mean about the relative orientation in the picture “Attic View” where the closest side of the Flex-Z Fast bracket is seen running horizontally across the picture between the joists. Having installed the Flex-Z Fast bracket I then used the inside edges of the bracket to enlarge the hole in the ceiling. I actually cut a hole about 10-1/4 ins square. I then fed the adaptor up through the hole, positioning it to one side of the hole. I then had the flange of the adaptor pressed up against the bottom side of the ceiling sheetrock. i.e. adaptor flange – ceiling sheetrock – Flex-Z Fast bracket. Next, I aligned / mated the fan body into the adaptor and pushed the fan body up through the hole until it was fully seated into the adaptor, and installed the machine screw to connect the fan body to the adapter (watch those machine screws …. they soon strip the female mating threads ….). Again, I then had the fan body flange sandwiching the ceiling sheetrock with the Flex-Z Fast bracket on the top side of the ceiling sheet rock. I then used the four provided self-drilling screws. Each screw went through a hole in the fan body flange, up through the sandwiched ceiling sheetrock and secured into the Flex-Z Fast bracket. Once all four screws were secured, the flanges are pressed tightly against the bathroom side ceiling sheetrock. Looks very neat and does not need any caulking! If some-one ever needs to replace the unit in the future they will thank me for not having to remove and clean up caulking! See picture “Bathroom View”. I noted the posted question about the three operation / control modes. I think that’s a poorly written part of the manual. I presume / believe that the described three modes can be accommodated by varying the humidity and timing settings – but it’s not really very clear. How I think the unit is designed to work is as follows; the fan should be hard wired in to the mains supply. The fan will then activate whenever motion is sensed. Once it no longer senses motion then it will run for a further xx minutes as determined by your setting of the timer delay. The fan will also be activated if either the humidity threshold (that you set) is breached or the unit senses a rapid build up of humidity …. even if it is below the threshold that you have set. Now …. I am not sure if the fan run time from this trigger event is determined by the timer setting or if it simply runs until the humidity change and/or level returns to normal? Of course, you can run the power to the fan through a wall switch if you want manual control over the fan – but that would kind of defeat the purpose of the motion sensor? Unless you taped that switch …. see later …. A work of caution. Here in Houston the humidity is standardly very high - 87% as I write this. So, I’m not sure how useful the humidity sensor will be in practice. (Setting can be varied between 30% and 80%). I’d initially thought that the main LED light (which is VERY bright – see picture “Main Light”) would be controlled in parallel with the fan. In other words, you entered the bathroom and the light and the fan would both come on, triggered by the motion sensor. Unfortunately, it isn’t. So, you’ll have to connect the main light separately from the fan through a light switch on the wall. And given its brightness, you might well be advised to use a dimmer switch so that you can adjust the brightness to suit. There is also a night light feature. If you want to use that, then it would be best to wire the night light directly to the mains supply aka the fan above? (see picture “Night Light”). Given that I had only wiring from one standard wall toggle switch, I connected the fan and the Night Light, but left the Main Light unconnected - as the boys felt that the Main Light was too bright. I then used a piece of clear tape to stick the wall switch in the on position. Now, when the boys enter the bathroom the fan initiates, and after they leave, it runs for our setting of 30 minutes. The Night Light gives a nice glow, so they don’t need to use the main room light unless they are going to be showering. And whenever I need to remove the fan grill for cleaning, I can remove the tape and switch the fan off before I start. For a better understanding of the wiring don’t look at Fig 5 of “New Construction” – rather look at the “Wiring Diagram” on page 6. If anyone feels I have erred or misunderstood any of the above – please post and let me know!

The site should have the ability to determine wiring needed prior to determining fan selection?

The fan works excellent. It is not loud and works efficiently with our newly installed steam shower. I only gave it four stars because the product detail is confusing. I assumed the light and fan were both on a motion sensor simultaneously. I did not realize this would require 3 separate switches, one for the fan, one for the light, and one for the nightlight feature. The fan and light work great, but I don't really utilize the night light or motion sensors as I had hoped because we did not wire it to 3 switches.

A little expensive but I bought it because of the moisture sensor. So far so good but do not know how long it will last I am sure I will post again if it does not work as it should. As said so far so good but is early.

Great product and easy installation

Overall very happy, humidity sensor had to be turned up to near max to prevent fan from running constantly. Wired fan to constant power except for light and night light. Quiet, effective, and blends in to ceiling. The motion sensor will turn on the fan and confuse guests sometime while or before they turn on the light. I no longer have to nag my kids to either turn on or off the bathroom fan, so that make life a little better.

Quiet, easy to install