We use it, as recommended by a ventilation specialist, for the hour ventilation / venting our cellar in a vent pipe 10, controlled by a timer and revolt have achieved the basement now has an acceptable, relative humidity.
The very solidly crafted fan fits perfectly into the pipe to be connected quickly and makes its services reliably without having to heat up even during prolonged use). The more than 100 m³ / h capacity-rich us well (ie, 2-fold change of air p / hour in our basement) and the bearing of the axis in a ball bearing not only soothes our mind but also the impeller, are so practically determine any vibrations.
Now, after about 5,000 hours of operation in the said intervals: The price / performance ratio, I see it as very good, the reliability as well, and thus once again not a bad buy and, free from remorse, allocation of 5 stars Amazon :)
Note 05/2015.:
After this moment "No-Name" stands, I would like to add yet that my review to "insertion tube fan DM-100, ball bearing, offered by Ett" refers)
