Supreme Astra 38 - Metallic Black (Fresh air adapter / 165 CFM blower / in-wall variable speed control included) (2024.5) A fireplace surround must be purchased to complete this model. If using a clean face surround, you must also purchase (1) KG540 Gravity Kit and (2) UCAC8 Gravity Ducts or (1) LV32 Linear Vent Kit and (2) UCAC8 Gravity Ducts.