The TRS21A Sparkproof Recovery Unit is a highly efficient and safe device used in the recovery of refrigerants from HVAC systems. With a powerful 1/2 horsepower compressor, it can handle both liquid and vapor refrigerants, making it versatile for a variety of applications. It features a sparkproof design to prevent any potential explosions or fires, and its compact and lightweight construction makes it easy to transport and use in the field. The TRS21A is a reliable and durable option for HVAC technicians who require a safe and efficient recovery unit for their work.