Product Description The H27RICAT housing is designed for remodeling use in shallow ceilings where 2 in. X 6 In. Joist construction is used. The wide variety of trims available allows a number of different lighting effects to be created with one basic housing. The H27RICAT is designed for installations where the housing will be in direct contact with air permeable insulation. From the Manufacturer The H27IRCAT housing is designed for remodeling use in shallow ceilings where 2-Inch x 6-Inch joist construction is used. The wide variety of trims available allows a number of different lighting effects to be created with one basic housing. The H27RICAT is designed for shallow ceilings where insulation is present. The H27RICAT housing is of AirTite construction and prevents airflow between living spaces and unconditioned attic areas.