The present invention provides a means and a device to control relative humidity and airborne contaminants within a defined environment. The devices and methods of the present invention enable a user to regulate the relative humidity of a defined environment and insure that extreme conditions, e.g. less...http://www.google.co.uk/patents/US6251344?utm_source=gb-gplus-sharePatent US6251344 - Air quality chamber: relative humidity and contamination controlled systems
