Direct Gas-Fired Make-Up Air Units
Our direct gas-fired heating and make-up air units provide maximum temperature control and unparalleled thermal efficiency for make-up air applications. Make-up air is heated directly by the gas flame, eliminating the need for a heat exchanger and associated efficiency losses of indirect-fired equipment, producing a thermal fuel efficiency of 100% (92% sensible gain). With a maximum firing rate turndown of 25:1, direct-fired units provide excellent temperature control over a wide range of inlet air temperatures. A wide variety of configurations provide maximum application flexibility with input ratings up to 7,862,000 Btu/hr and airflow capability to 60,000 CFM.