This product was designed for single wall IC construction, for use in insulated ceilings. It has a 7.5" height that allows for use in 2x8 construction. Housing meets restricted air flow requirement (per ASTM E-283) and also has adjustable housing that accommodates up to 1 1/4"ceiling thickness. This item was built for use in sloped ceilings with a 2/12 to 6/12 pitch.