Preposition: of

• air: The standard logic of radiator placement is that they should be placed under windows to counteract the downdraft of cold air from the window.

Converse of object

• feature: The XB also features a downdraft Ram Air intake that increases airflow and power at high speeds.

Modifies a noun

• fuel: Downdraft fuel injection with no airbox on the side of the bike.

• injection: Downdraft fuel injection with no airbox on the side of the bike.

• kiln: From as early as 1881 some manufacturers were using downdraft kilns in pursuit of fuel economy and improved consistency in temperature achievement.

Noun used with modifier

• winter: Such measurements show a winter downdraft that is strongest over the latitude range from 40° to 60° .