Compressors Quality Begins Here Our compressor quality begins with the raw material and core receiving processes at our warehouse in Grapevine, Texas. Aided by voice-recognition software, every core is checked for condition and inventoried accordingly. All inbound raw material goes through a quality assurance process. From this point, the inventory level of all material is controlled using a kanban system. Throughout the implementation of kanban, just-in-time and other lean manufacturing techniques, Four Seasons has been able to produce vastly larger quantities of compressors in the same amount of space. New and Re-Engineered • Engineering • Machining • Manufacturing • Distribution R4 Flyer H-series Flyer Import Flyer We're green to the core... Four Seasons uses bio-compatible detergents for virtually all cleaning processes. This water is treated to remove contaminants in Blue Streak own on-site water treatment facility. Compressors are painted with water-based paint, thereby eliminating the release of harmful petroleum-based fumes.