VIVOSUN Inline Duct Fan 6 Inch 440 CFM with Variable Speed Control for Grow Tent, Ventilation, Plant Tent, Indoor, Garden, Ventilation Fan, Z6 Pipe Fan, Black

Passt, hat eine brauchbare Druckdifferenz um eine Hephafilter davor oder dahinter zu schalten. Geräuschentwickung angenehm und angemessen! Preis sehr gut. Habe damit einen Werkstattfilter gebaut.

We had a 2nd floor room in our century-old house that had only a faint breeze coming from its vent via 6" flexible duct tube that was routed down through an old chimney to the basement where there was only a short distance between the main duct from the furnace/HVAC and the hole in the chimney. Consequently, longer inline fans were not an option. After installing the Vivosun 6" fan, that previously hot-in-the-summer and cold-in-the-winter room now has the best airflow in the house-- even airflow overkill for just one room. The variable speed controller on the fan allows you to adjust from super fast all the way down to very fast. Yeah, it won't blow slowly. This fan is no wimp! The fan is well balanced and lubricated and runs very quietly. About the only noise is from the wind that the fan creates, which is to be expected and is unavoidable. The motor itself is just about silent. UPDATE: January 15, 2020. After using it for a year and a half, it started to squeak and then make a rubbing sound. I contacted Vivosun and asked if there were any lubricants that they recommended or would advise against. They refunded my purchase price (!) and said that purchasing a new one from Amazon would be faster than servicing it. This is well past any warranty time and WAY ABOVE AND BEYOND any expected customer service! Excellent service!

Great quality and really clears the air

Works as expected, and quality seems fine. I'm happy with my purchase

Very quiet and reliable! The speed control is icing on the cake because even more-expensive fans seldom have that option. This fan was actually cheaper than a similar Chinese-made blower that I bought months ago, but this one is MUCH better made. This one it is replacing was too loud, and after just a week started rattling and making out-of-balance noises that only improved slightly when I tightened things up. Not the Vivosun fan! This thing has now been in service just as long as the old one, and it still sounds and moves air like it was brand new. I very much feel comfortable comparing its performance to that of a Hurricane fan (one of which I also own). These things are perfect for building stand-alone air filter/charcoal filter boxes. My whole family has allergies, and teamed with the right filters this thing is keeping my family sniffle-free without all the noise of a HEPA filter.