The Reznor UDX75 Power Vented Gas Fired Unit Heater is a high performance heater designed for use in commercial and industrial applications. This unit features a vented design that allows for increased air flow and improved heat distribution. The Reznor UDX75 also features a high efficiency motor that provides superior performance. The Reznor UDX75 Power Vented Gas Fired Unit Heater is a high performance heater designed for use in commercial and industrial applications. This unit features a vented design that allows for increased air flow and improved heat distribution. The Reznor UDX75 also features a high efficiency motor that provides superior performance.