Useful data? Cooling with filter fans „2500 cm³ Capacity, trick“…“268 PS, trick“…“275 km/h max. Velocity, trick“, As a kid, these values were powerful arguments to steal the cards from the opponent in [...] It is not only the case for thermal management that there is a flood of information on technical data these days. And sometimes the usefulness of various figures for the customer is more than questionable [...] one thus comes closer and closer to the value of the free-blowing airflow of the filter fan. In some data sheets you will find the value free airflow . This is purely a statement by the fan manufacturer for