How long does a cabinet take to reach its set humidity?

Pull-down time depends on the grade, the load inside, how much moisture the load itself is carrying, and the ambient conditions where the cabinet is installed. A cabinet switched on empty settles much faster than one loaded with moisture-bearing material. Rather than quote a single figure that would not apply to your situation, we prefer to work it out: tell us the material, the quantity, the starting conditions and the grade, and an engineer will give you a realistic expectation along with the quotation.