Tech DriveBathroom Ventilation and Exhaust Fan with Humidity sensor,110CFM 0.8 Sones with 6inch Duct

I brought this a year ago. Quiet and work great

Very quiet. Matched the exhaust port on failed Broan, exhausts more air and easy to wire up because they put junction box in best location. I usually don't buy no-name stuff but glad I did.

You can barely hear this fan running. It is great, highly recommend it!!

Summary: The fan is quiet, and does a decent job of moving air, but it is not strong enough to move air through a long exhaust duct.I bought this fan to help draw heat from a small closet that contains computer and A/V equipment. The closet is inside the house, but has no HVAC duct other ventilation, so the equipment tends to keep it very warm. The fan is rated at 70cfm and my closet is barely 50 cubic feet, so I figured this would do a decent job. I paired it with a thermostat in hopes of keeping the closet temp no higher than 78F.Installation was simple with attic access from above to screw the housing to a joist. The housing does have keyhole style screw slots for mounting to the joist, so it is theoretically possible to install this without access from above. Even so, it would be very difficult to do it that way, and it would likely leave the fan loose against the joist where it could rattle and vibrate. If you cannot install this fan from above, you might want to choose a different one made for “old work” mounting.I attached about 15 feet of flexible ducting to the exhaust port of the fan to route the hot air to a soffit vent. After installing everything, I set my thermostat at 78 and waited for the closet to cool down. After an hour, it had not dropped at all. I used a small sliver of paper to see if the fan was drawing air, and it was not. I checked the end of my duct and air was barely moving out of it, but when I detached the duct from the fan’s exhaust, it was blowing very well. I decided that the fan was too weak to push that amount of air through the length of duct. Since this is not in a humid bathroom, I just removed the duct and let the fan vent directly into the attic. It then quickly cooled the closet.With the closet door closed, and everything else in the house quiet, I can just barely hear the fan running. I’d say it’s about as loud as a typical computer fan. It is nowhere near as loud as the contractor-grade ventilation fans in the bathrooms. So far, it is doing its job, and I am happy with the purchase. If you do need to duct the output of this fan, you may want a model with a stronger motor.

After 33 years, my old fan started making noise, so it was time for a new one. Replaced one in another bathroom before and it was noisy, so did my homework on this one. The difference between 6 Sones and 2 Sones is amazing! I love this one, can't even tell it is on unless you are in the bathroom. The old one could be heard throughout the house (before it started to die). The new fan installed upstairs last year was also 6 Sones and can be heard down stairs! The only downside is that the new one was deeper (taller) so had to replace the entire casing (the 6 Sone model fit in the old enclosure) so had to go up in the attic and remove everything, then install the casing in the rafters. Definitely a 2-person job at that point, so I bit more involved. Overall, it was worth the extra hassle.

The hard part is retro-fit when you don't have access to unscrew the old housing from the joint. This one happens to the exact size (7-1/2 by 7-1/4) of the old builder fan, the the height is a bit bigger. So I try to fit this into the old housing. What you need is to take down the support parts connecting the fan (in black) from the new housing, find a way to attach them to the old housing (see picture), then attach the fan to the support parts. Due to one side the housing was for ground wire attachment, not smooth, I was only able to use 2 out of 3 supports. But it seems good enough with the tight fit and friction. But if you are not handy, it will take quite some time to do it.This one is 2 Sone, 70 CFM, much improvement over the builder 4 Sone/50 CFM fan. Also easy to replace if needed because it is screwed in.

very quiet. very easy install.