An improved incubator (4) and control apparatus (16) include separate temperature and humidity control loops (36 38) wherein a commanded temperature (44) and a commanded relative humidity (RH) value (46) are commanded to the control apparatus via a user interface (40). The control apparatus employs a humidifier rate saturation controller (74) which acts responsive to both a humidity control signal (72) and a current temperature (52A) to regulate the addition of humidity to the air within the incubator assembly to avoid a transient humidity from exceeding a predetermined value and thereby avoiding the generation of condensation within the incubator.
