Heat exchange system for patient support surface

A support surface assembly, comprising:

• an outer ticking defining an interior;
• a core including core blocks arranged in the interior to form a first insertion cavity and a second insertion cavity, wherein the outer ticking extends over the core;
• a first thermoelectric module selectively disposed within the first insertion cavity;
• a second thermoelectric module selectively disposed within the second insertion cavity, wherein the core blocks are configured to be interchanged between different positions within the interior to change locations of the first and second insertion cavities to, consequently, change locations of the first and second thermoelectric modules, and wherein each of the first thermoelectric module and the second thermoelectric module is a self-contained and removable unit that includes:
• a support structure defining an airflow channel;
• a thermoelectric device coupled with the support structure;
• and
• a fan coupled to the support structure and configured to direct air through the airflow channel;
• and
• a controller in communication with the first thermoelectric module and the second thermoelectric module, wherein the controller is configured to selectively and independently direct a current through the first thermoelectric module and the second thermoelectric module to adjust a temperature of a corresponding area of the outer ticking.