Both fans are provided with mounting screws and noise dampening rubber mounts so there is minimal effort needed for the installation.
While installing the fans I noticed that the white FM83 could only be installed one way round due to its 92mm fan in 80mm frame design. It seems possible that they could have had screw mounts at both ends of the fan giving you the option of attatching it to either a 80mm or 92mm fan mount. As is though, it can only be mounted one way and that is as an exhaust fan. So intake air for this bad boy.
After installing both fans we left them for a week to test them for dust build up.