Abstract: A climate-controlled bed capable of adapting to the needs of a sleeper via a closed loop feedback control system is provided. The bed includes a thermoelectric energy source, a sensor configured to monitor a physiological temperature of a sleeper, and a control system that regulates a temperature of the bed via the thermoelectric energy source. The control system can utilize data from the sensor to determine optimal thermal needs of the sleeper. The control system can also vary the temperature of the bed during a sleep cycle based on at least one predetermined sleep factor, such as the natural circadian temperature cycle.