Abstract: An apparatus for removable mounting of a corrugated hose into an air-conditioning duct, a building structure including the same, and a method of terminating an air-conditioning duct. The apparatus comprises a unitary body defining a tube that is sealingly engageable with the duct and a flange at an end of the hose for abutting a wall around the duct, a plug sealingly engageable in the tube, and a cap. The tube is configured to selectively snap-fit with the cap or the hose.