Microclimate system for a patient support apparatus

A microclimate system comprising

• a support surface including a topper, the topper configured to conduct air along a top face of the support surface so that heat and moisture from a patient lying on the support surface are drawn away from the top face of the support surface,
• an air box including a controller, a blower coupled to the controller and coupled to the topper, and
• an environmental sensor unit coupled the controller, the environmental sensor unit configured to detect environmental information corresponding to the surroundings of the support surface and the air box,
• wherein the controller receives the environmental information from the environmental sensor unit, determines if current operating parameters of the air box provide a rated level of heat withdrawal or evaporative capacity through the topper based at least in part on the environmental information, and updates the current operating parameters of the air box if the current operating parameters of the air box do not provide the rated level of heat withdrawal or evaporative capacity through the topper.