Function introduction and scope of application The HCL015~HCL025 Series Cabinet Air Conditioners are often used in small space (such as electrical cabinets, control cabinets and laser cavities) to satisfy heat dissipation requirement and stabilize air temperature. The internal and external circulation systems are separated to ensure closed internal circulation and keep out water, moisture, and dust. The HCL015~HCL025 Series Cabinet Air Conditioners are applicable to electrical cabinets, precision instruments, clean rooms, and scientific research projects.