The Midco International 4090164 Burner Assembly RE4400DS 30Sec Pre-Purge is a high-performance gas burner assembly designed for commercial and industrial HVAC heating systems. Engineered for reliable ignition and consistent combustion, it features a 30-second pre-purge cycle that clears residual gases before startup, enhancing operational safety. This burner assembly is commonly used ... https://www.partshnc.com/4090164-midco-international-burner-assembly-re4400ds-30sec-pre-purge