CRAClaitteiden

CRAClaitteiden are cooling units used to maintain the temperature, humidity, and air quality of data centers and other IT rooms. In Finnish, CRAC-laitteet refers to computer room air conditioning equipment, and CRAClaitteiden is the genitive form meaning “of CRAC devices.” These units are a central part of data center infrastructure because proper environmental conditions help prevent equipment failures and support reliable performance.

Most CRAC devices are self-contained cooling units that condition air delivered into the room. They may be air-cooled with a direct refrigerant cycle, or they may be built around a chilled-water coil (the latter are sometimes called CRAH units when used in this context). They are typically equipped with sensors and control logic to maintain setpoint temperatures, humidity, and pressure balance between aisles. They are commonly deployed with hot-aisle/cold-aisle configurations and designed for redundancy, often N+1 or 2N.

Installation considerations include placement for efficient air distribution, integration with building management systems, and the potential use of economizers in suitable climates to reduce energy use. Energy efficiency is influenced by compressor technology, fan design, and control strategies such as variable-speed drives.

Maintenance and reliability: Regular maintenance includes filter replacement, coil cleaning, refrigerant checks, and fault diagnostics. Common failure modes involve fans, condensate management, refrigerant leaks, and electronic controls. Standards and guidelines from organizations such as ASHRAE influence recommended operating ranges and design practices for CRAClaitteiden.