What are diffusers mounted over a light fixture with air outlets on both sides called?

Troffer diffusers are specifically designed for integration with light fixtures, allowing for the distribution of air in a manner that enhances both lighting and airflow. These diffusers typically feature air outlets on both sides, facilitating even air distribution across the space below. This dual outlet design is particularly effective in commercial settings where maintaining consistent temperature and air quality is essential alongside providing effective lighting.

In contrast, wall-mounted diffusers are primarily installed on vertical surfaces and are not designed to integrate with light fixtures. Ceiling diffusers often lack the side openings seen in troffer configurations and are geared more towards dispersing air from ductwork rather than working in conjunction with lighting systems. Exhaust diffusers serve a different purpose, primarily utilized for removing air from a space rather than combining air supply with light. This functional distinction underscores why troffer diffusers are the correct choice for the question.