OnTrack has a clean room. Copied from their website: "A cleanroom environment allows for a damaged drive to be opened without causing further harm and data loss. In order to create a cleanroom environment is a system is devised for routing the air flow on rows of workbenches in an arrangement based on high-quality submicron particulate air filters which trap small particles. These systems use special HEPA filters (high efficiency particulate air filters) to filter out suspended particles only 0.0005 millimeters in diameter. All Kroll Ontrack workbenches in our cleanrooms follow ISO 14644-1 class 5 standards.".
Copied from their website:
"A cleanroom environment allows for a damaged drive to be opened without causing further harm and data loss. In order to create a cleanroom environment is a system is devised for routing the air flow on rows of workbenches in an arrangement based on high-quality submicron particulate air filters which trap small particles. These systems use special HEPA filters (high efficiency particulate air filters) to filter out suspended particles only 0.0005 millimeters in diameter. All Kroll Ontrack workbenches in our cleanrooms follow ISO 14644-1 class 5 standards.".