Yes, Aero Pure Bathroom Fans are ETL/cETL listed for use in insulated ceilings (Type I.C.). Loose-fill or batt insulation can be placed directly over the fan housing in the attic. The fans and fan/light combination units do not create excessive heat which is a common problem with recessed light fixtures or some competitors′ fan / light combinations. Our efficient, cool-running motors and our LED lighting units do not create enough ambient heat to be subjected to these limitations.