Rhonchi

Tracing Lung Ailments That Rose With 9/11 Dust - New York Times
After nearly five years, it is still too early for these doctors, scientists and forensic pathologists to say with certainty whether any long-term cancer threat came with exposure to the toxic cloud unleashed by the trade center collapse. But there are already clear signs [...]

Roomba and Respiratory Care… a connection I never would have imagined. Maybe Roomba needs DME (durable medical equipment) status.
Consumer Reports On Roomba
Several people with respiratory problems like allergies were extremely happy because the Roomba tirelessly cleans their rooms even when they are too tired to vacuum.