Model DGX is a highly configurable direct gas-fired heating and cooling system engineered for maximum application flexibility. Its modular platform supports a wide range of configurations, including constant volume, 100% outdoor air, recirculation, and VAV airflow arrangements. The DGX can be equipped with forward-curved, backward-curved, or mixed-flow plenum supply fans, available in either belt-driven or direct-drive configurations, allowing performance and efficiency to be matched precisely to project requirements.