• P series close control air conditioners are suitable for various types of special applications, such as metrology laboratories, TV production studios, recording and conservation rooms for musical instruments, museums and archives, control rooms in power stations and railway junctions • R series close control air conditioners are built and sized in such a way that they can be installed alongside data center racks in air conditioning systems for large data centers. • G series close control air conditioners have constructional and operating characteristics suitable for the latest generation data centers.