| heating duct | 0.92 | There is no noise from the heating ducts. | ||
| air-conditioning duct | 0.66 | A black bear ducked out through an air-conditioning duct. | ||
| pancreatic duct | 0.59 | Injections should be placed into the apex of the sphincterotomy, avoiding the area around the pancreatic duct. | ||
| metal duct | 0.53 | The dampers are little metal handles in the metal ducts. | ||
| round duct | 0.39 | Round ducts extend from this trunk to the registers in each room. | ||
| dryer duct | 0.33 | All dryer ducts should be inspected and cleaned at least twice a year. | ||
| large duct | 0.33 | These smaller ducts should have dampers near the large duct. | ||
| same duct | 0.26 | Now I want to put in air conditioning, using the same heating ducts. |