This view shows several features of a typical walk-in chamber:

• Multiple heated windows for observation


• Dry-air purge system (by front corner)


• Conditioning plenum (left bottom)


• Fresh-air supply preconditioning system (left top)


• Note how the conditioning system is elevated above the chamber floor. In its final installation, the floor will go in a shallow pit, so vehicles can be driven into the chamber without requiring a loading-ramp.