I regularly buy this model. Apart from its friendly appearance (black and white), the pale are always well balanced (no unwanted vibrations) and practice speed: In 12v he made a murmur (1350tpm max) but is bearable (in case of failure of the control system the sound level will not débilement strong) Once regulated to 800 to 1000tpm become inaudible and he continues to brew a large quantity of air. This is a fan adapted for housing purposes (more oriented CFM and static pressure) but which can do both, radiator on performance is not too bad either. This point also account for locations with some filters or closed gates. The final reason for the 5 star price. Indeed I compare it to costing more than double fan!
