Hi Steve, You may find that the low humidity will lead to a significant risk of ESD damage to your parts, as well as rather uncomfortable working conditions for your people. Richard L. Shook and co-workers published an excellent paper on Moisture Absorption/desorption rates at last years ECTC: Richard L. Shook et al: Diffusion Model to derate Moisture Sensitive Surface Mount ICs for Factory Use Conditions, pp440 - 449; 45th Electronics Components & Technology Conference, Las Vegas, 1995. His data is particularly valuable (and re-assuring)for operations in which a bag is opened and closed daily, in which an effective dessicant is included. I hope that this helps you. Tom Moore, Package Development, Analog Devices B.V., Ireland.