AC Infinity Inline Duct Fan Silencer, 4" Noise Reduction Muffler Blower Silencer for Indoor Hydroponics Grow Tent Ventilation Systems

It really cuts down the noise from the fan, I can run it two settings higher with this. To my ear the tone sounds better too

I’m using this for residential crypto mining with an 8 inch S8 fan. It is crazy loud, but still quieter than the fans on the mining ASIC. Before buying this, it was just too loud to run at night, costing me income. The fan needs to be at least on level 8 during the day to cool the hash boards, and that is really loud in a residential area. For grow tents, you probably won’t need to run it at level 8 unless you need a jet intake in your tent for some reason.This is perfect. It is so effective that I can run the fan at 7, maybe 8, even at night. It also doesn’t restrict the air flow much at all, and temperatures are not affected. I have an 8 inch duct filter on the end, and it’s even more quiet.Oh yeah, and don’t use duct tape. It defeats the purpose a little since sound will get through the joints. AC Infinity sells 8 inch silencer clamps which is a tube of thick rubber and a clamp at each end. Not only is this more secure and cuts down on sound, but they make your setup look really clean. Another clamp was needed for my filter, just fyi.Note: if you really want this in silver, you may need to request it. Mine came in black, but still looks great.

Does what it's made for , making the fan quiet so you can sleep and or the neighbors don't hear

I had wondered when the description said it "will reduce fan noise by up to 50%" whether this meant the sound power was reduced by 50%, a 3-dB reduction in power, which would be hardly noticiable, or it it meant the apparent sound was cut in half, which is more like a 10-dB reduction in sound power (hearing is non-linear). I can report that it appears to be more like the latter, since the noise reduction is significant.

Everything we have bought from AC Infinity works well and is high quality. They also have very good customer service. We do not hesitate when it comes to purchasing their products.

Was skeptical, but had to deal with noise from 8 inch inline fan , after installation of silencer hear refrigerator more compared to fan . Definitely going to use more in nearest future

It eliminated the noise coming from a CloudLine AC Infinity T6 Inline fan, at it's highest speed.

The product does what it says, reduces air flow noise from/through ducting. Don't expect it to reduce noise from a fan itself (motor noise).Like others have stated, my product came with dents. That dispute any poster's comments regarding these products being "well packaged." Maybe the others are, but this one isn't. There is foam in the box on the top and bottom of the device, but none on the sides at all. Any impact or pressure on the sides of the box will dent the product. Get on that AC Infinity, should know better by now.And on packaging, this product DOES come with labels on the outside clearly stating what it is. If you live somewhere that discreet packaging is important, this can be a big issue. Get on that AC Infinity, should know better by now. These are simple fixes.