What are redundant CRAHs?

Data Center CoolingRunning servers and hardware around the clock generates a considerable amount of heat in data centers, and each one must invest in adequate cooling to protect its clients’ machines. While data center operators may use a variety of cooling methods, our DC area colocation centers use multiple computer room air handlers (CRAH) to prevent interruptions due to overheating.

Common Methods for Controlling Temperature and Humidity in Data Centers

Servers and hardware can take considerable power to cool, as a single rack of servers can easily generate over 100 degrees. Most data centers run at temperatures around 68 degrees, keeping the machines cool enough to work while maintaining optimal climate control.

Cooling methods used in computer rooms and colocation centers include:

  • Air conditioning units. Air conditioning, a system that blows air over a cooling coil filled with refrigerant, has been used in many forms to keep electrical systems cool. However, simpler units are being phased out in favor of more modern CRAC and CRAH units.
  • CRAC units. Computer room air conditioning (CRAC) systems work similarly to air-conditioning units, but are able to maintain a set temperature, air distribution, and humidity level. In most cases, the cool air is dispensed through an elevated floor, forming cold aisles that move through the racks. The picks up heat, forming hot aisles at the rear of the racks, then returns to the CRAC intakes above the floor.
  • CRAH systems. A computer room air handler (CRAH) differs from a CRAC unit because the air is cooled over a cooling coil filled with chilled water instead of using mechanical refrigeration. CRAHs are able to modulate fan speed to maintain a set static pressure, keeping both temperature and humidity stable. Our two facilities offer N+1 or 2N redundancy for cooling and power, complete with built-in CRAHs, a multi-stack chiller plant, and hot aisle containment for high-density accommodation.

ATI Solutions has a variety of highly-customizable IT interventions and deployment options that can be scaled up or down according to your business’ needs. Contact us today to get more information about the storage and service options in our D.C. data centers, or set up an appointment to tour our Chantilly facility.