AC Infinity Noise Reduction Clamp 8-Inch, Duct Coupler with Stainless Steel Clamps, Flexible Rubber Coupling for Inline Fans and Carbon Filters in Growing and HVAC

I got this for a 4" exhaust fan in a small grow box and it works great. I have it in between the fan and a carbon filter. The rubber is very thick and does a great job of reducing noise from vibrations of the fan. The clamps that come with it are solid and keep a tight seal on the fan and filter.All of their products are fairly priced and this is no exception. Quality product at a great price makes this a must have. Nothing to dislike about this product whatsoever.

I purchased an S&P Powervent PV-150X remote mounted exhaust fan for a bathroom that I am renovating. The PV-150X fan is great but the "kit" didn't have anything to connect the 6" duct to the fan inlet and outlet. I found these rubber couplings and they were PERFECT. They fit the fan connections snuggly and the 6" duct was even tighter.The rubber used for the couplings was flexible and appears to be very durable. The stainless steel hose clamps were equally well made. Overall, the price was very fair for a quality product. And the packaging was great. They put a big foam donut in each coupling so that it would not get crushed out of shape. The rubber coupling will also help isolate any vibration when the fan is running.

Very well made, easy to install, and makes joining my inline duct fan to the pipe much easier. I take the fan off about once a year to clean it...had been re-securing with foil tape each time, but now I can just un-clamp and re-clamp these fittings to remove the fan. Also helps in reducing the noise vibration from the fan. Diameter is good for 4" applications.

Works nice wouldn't use a fan without having one one each side of fan. Great Product !! They fit nice and no coming off at anytime if put on right the first time

If you’re doing ductwork, these things work amazingly well. If you have two crimped ends that need to fit, it’s no problem. Regular full size ends fit just as well. A big bonus is that they knock down the noise. The only downside is that I don’t like their clamps because the bolt seems metric, but a standard screwdriver usually works just fine.

AC Infinity’s products are once again the top of their field. Competition doesn’t come close. So much easier than using and wasting tape over time and time again, Highly recommended. Does it Dampens the vibrations/Noise? Clearly makes great common sense with the quality materials used.

Definitely helps for a good quality seal. Little bit of a pain if your connected something flexible (like a hose) using this. But for hard connection to hard connection. Works great

Used this between a whole house HEPA filter and the HVAC duct. It eliminated the annoying hum.