Fantech FR 110 4-Inch Inline Centrifugal Duct Fan with Molded Housing - Quiet Ventilation for Bathroom, Kitchen, Grow Room & HVAC Systems

It sure pays to spend a bit more and buy a quality product! This fan is excellent in every way. Definitely NOT China! Made in Germany; assembled in the US. So well made it reminds me of the old days when things were actually build to last. Details. It is totally silent. Virtually 0 noise from the fan. Only the sound of wind, with a slight hum if you listen really hard. Everything about this unit is top level - even the system for attaching the power wire. The fan is pre-wired into a Molex connector. Just slip in the power wires and tighten the screws. And several powering options are provided, with different connections on the Molex.The only possible negative comment would be regarding the attachment of the mounting bracket to the fan body. Screws were provided but that would have meant driving metal screws right through the fan housing. Fearing coming too close to the impellers I chose instead to use two part, high strength epoxy to attach the mounting plate. It worked well. Overnight setup. Did the job without compromising the integrity of the air chamber.