Thermoelectric cooler has 2 functions, both cooling and heating. The cooling efficiency is generally 55~60%, but the heating efficiency is always higher than 1, and one can replace the separate cooling system and heating system.
Thermoelectric Cooler 4 Layer Refrigeration Computer Accessories Tec4-2460 AM
Diymore TEC1-12706 Thermoelectric Cooler Peltier Heatsink Plate 12V Cooler Cooli
DC 5V 19.4W Thermoelectric Cooler Peltier Cooler Cooling G2G93279
Peltier Cooler Kit Small Size Sealed Structure Thermoelectric Cooler
5V/12V TEC1 Heatsink Thermoelectric Cooler Peltier Cooling Plate 20/25/30/40MM
TEC1-12703~12715 Heatsink Thermoelectric Cooler 12V Cooling Peltier Module Chip