David Adams (formerly with OI) now with Thermo Fisher, has an opportunity for a couple of reach-in chambers and asked about the Dual HEPA filtration and the ability to have continuous filtration even when the door is opened for air entering the chamber.  I not sure if this is possible but wanted to check and see if so and what would we need to do to provide this.  We have the Dual HEPA cost, but this seems a bit more detailed.