> 1 second may or may not be a realistic expectation of response time. 
> The control system will of course affect this as well, what system 
> are you using?


For faster response time you could have a small percentage of the load 
as a variable resistive heater which you modulate against the TEC 
cooling. Reduced extra heating increased cooling and vice versa. A 
resistor heater can be made extremely fast by having minimal mass.


        Russell

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