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Originally Posted by killernoodle
A 172W tec cannot put out 200W of heat
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Be careful. The Qmax rating of a TEC, ie the 172W in this case, is a rating of the maximum amount of thermal energy the TEC can dissipate FROM THE HEAT LOAD, and is NOT anything to do with the power drawn by the TEC from the power supply which must also be dissipated as heat. This can often be more than the Qmax of a TEC when run at Vmax.
8-ball