Step Down Diffusers A complete UL-listed factory package. Square face diffusers with UL-Listed ceiling radiation damper. Available in 2-cone and 3-cone configurations. XG-5700-FRS Series 2-cone square face diffuser with a round neck and UL-Listed ceiling radiation damper. VER XG-5700-FRS Series https://catalog-api.greenheck.com/api/category/es-419/608 XG-5800-FRS Series Square face diffuser with radiation damper. VER XG-5800-FRS Series https://catalog-api.greenheck.com/api/category/es-419/609
