The previous answers correctly explain the problem of your enquiry, which is why the manufacturer does not provide any information in this regard. In any case, it is reassuring to know that the guaranteed 250W is rarely reached. It remains important that the enclosure is well ventilated so that the heat is dissipated as quickly as it is generated, which requires the installation of many powerful enclosure fans that primarily suck in air at the bottom and blow it out at the top.

The main factor responsible for the cooling capacity of all air coolers is the surface area of the cooling fins, which dissipate the heat into the air. This is so large with this fan that a lot of waste heat can be dissipated even at a very low fan speed. Other factors, such as the ambient temperature and the fan speed, naturally influence the cooling performance, but not to the same extent as the cooling surface.