Compressor including a housing (2) containing a compressor element (6) that is powered by a variable speed motor (7) with a control box (8) with a set maximum number of revolutions (Nmax) for the compressor element (6), an air cooling blower (10) which sucks air from the environment via an inlet (11) and blows it back to the environment through the housing (2) via an exhaust (12) and a cooling circuit (13) for the cooling of the gas which has been compressed by the compressor element (6), further wherein the control box (8) is equipped with an algorithm (24) that reduces the maximum allowed set number of revolutions (Nmax) to a defined level as soon as the monitored environmental temperature (T20) rises above a maximum set level (Tmax), and the maximum allowed set number of revolutions (Nmax) is increased as soon as the environmental temperature (T20) falls below the maximum set level (Tmax).