A thermoelectric air conditioner consists of six main parts: thermoelectric (Peltier) modules, sealing and insulation materials, a cold-side heat sink, a hot-side heat sink, a cold-side fan, a hot-side fan, and a monitoring/control module. When power is supplied, one side of the thermoelectric module produces cooling while the opposite side produces heat. The generated cooling and heating energy is transferred through the cold-side and hot-side heat sinks and dispersed by the corresponding fans. The cold-side heat sink and fan form the internal air loop, which recirculates cabinet air to provide cooling inside the enclosure. The hot-side heat sink and fan form the external air loop, which rejects heat to the ambient environment outside the cabinet.