Methods and apparatus for controlling the temperature of a seat such as a
vehicle seat are disclosed. The apparatus includes an electrical heater disposed
in the seat, a cooling unit such as a cooling element and a fan, a detector for
detecting the temperature associated with the electrical heater, and a controller
for controlling the electrical heater and the cooler based upon the detected temperature
and upon the humidity algorithm comprising a predetermined set of calculations
of the humidity of air at different temperatures.
