The fan's frame is plenty strong to hold it up. The only issue I see is that a baffle or case would better direct the air, allowing a lower speed fan. However,

The fan's frame is plenty strong to hold it up. The only issue I see is that a baffle or case would better direct the air, allowing a lower speed fan. However, the amount of air movement required here is exceedingly small already, as can be seen by their fanless heatsink already meeting the 85C requirement.