matt and I are working on a slick fan timer.
it will control up to 4 fans.
run time adjustable from 1 to 60 minutes per hour.
also, the ability to have 1 set of 2 fans run independently from the other set of 2 fans.
This will not be a cheap setup, but when someone has a large cooled cabinet filled with cigars, they can easily have $20,000 invested, so the cost of the fan timer will be little compared to what they have invested in thier cabinet and cigars.