https://www.metamods.net/Foro/viewtopic.php?t=44 my pal and an industial engineer specialliced on thermodinamics discussing on peltier cells and why liqid nitrogen is not as good idea as it sounded the frist time... use this gases instead "R-134A, R-404A" btw his pc box "sweats" because of the difference of temperature with the room