This remodel housing is for existing ceilings up to 2" thick, is AirSeal ready and complies with MEC and WSEC air leakage requirements when installed as instructed. This Lightolier remodel housing may be used in existing ceilings up to 2" thick. This is a convertible IC/Non IC housing depending on the wattage of the light bulb and trim used. AirSeal ready and complies with MEC and WSEC air leakage requirements when installed as instructed.