It is a nifty little device, but it has 1 problem - a narrow temperature band (won't go to 100°F):
temperature range: 41°F to 86°F (5°C to 30°C)
Right, at 86°F the fan would almost always be running considering TiVo and the set-top box are always running... In which case I would be better off just running a fan without a thermostat.
I think I'll do some temperature tests in the cabinet with the doors closed so I have a better idea of what to expect.
You could 'pad' the pot (add or change the value of resistors on either side of the control) and shift the control range.