KUB Refrigeration Unit Semi Hermetic 4FES-5Y Cooling System Piston Condensing Unit for Cold Storage The KUB semi-hermetic 4FES-5Y refrigeration unit is a high-performance piston condensing unit designed specifically for cold storage applications, offering reliable cooling system solutions. Model 4FES-5Y Type Condensing Unit Product Images Frequently Asked Questions Q1: Are you a manufacturer or trading company? A1: This compressor we are agent, but we are factories that