Abstract: A shield for a humidity sensor probe includes a hollow enclosure substantially covering the humidity sensor probe, the hollow enclosure having a peripheral wall and a forward end wall, the peripheral wall secured to a rearward flange adapted for securement to a humidity sensor housing; wherein the peripheral wall is provided with a plurality of flow apertures.

Abstract: A method to ventilate a rotary machine housed in a compartment having a ventilation air inlet and air exhaust, a variable speed ventilation fan and a temperature sensor, wherein the method includes: sensing a temperature level of the rotary machine; applying the sensed machine temperature level to a controller for the fan; drawing ventilation flow through the compartment and over the machine; determining whether the sensed machine temperature level is above a desired temperature level of the rotary machine, wherein the desired temperature level is determined by the controller, and the controller setting an operational condition of the fan to increase the ventilation flow through the compartment if the sensed machine temperature level is above the desired temperature level.