There are so many elements to consider when exploring the best way to effectively design and cool a server room; from the nature of the space (has it low ceilings, does it have a raised floor etc.), the extent of cooling required, the level of environmental monitoring needed, the best method of fire suppression, the list goes on. However with Critical Power’s extensive knowledge and experience, we can offer an unbiased view on the very best solution for you. By understanding your requirements and your space, we will explore and make recommendations on the many options available, including:


CRAC Cooling

These devices replace previous air conditioning units to ensure that temperature, air distribution and humidity are monitored and maintained. Using a variety of techniques, the CRAC cools the air generated by the racks. This can involve dispersing the air through an elevated floor with the air rising through the perforated sections to form cold aisles. The result is that the cold air flows through the racks, picking up the heat as it goes, before exiting from the rear. The air moves from these hot aisles behind the racks and returns to the CRAC intakes positioned above the floor.

Critical Power Supplies - Hot and cold containment for CRAC cooling system diagram

Portable Air Conditioner

In some instances, there may be a requirement for portable cooling. There are a wide range of portable air conditioning units, ideal for single room or multiple sites, which principally fall into three types:

  • Exhaust Tube Units: designed to disperse the heat via an exhaust tube.
  • Split Type Units: ideally suited for large capacity environments, such as server rooms or large offices.
  • Evaporative Coolers: ideal for comfort cooling where conventional air conditioners struggle.

Easy to use, these systems can be simply plugged in exactly where you want them. Fitting with Critical Power’s environmental stance, we ensure that any portable air conditioning units we supply are energy efficient, deliver reduced emissions and offer low running costs.

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Air Cooling

Offering amazing flexibility in where you can deploy your data centre hardware, fresh air cooling uses clean air pulled in from the outside, via a fan. These systems remove the need for expensive cooling equipment and are suitable for small to medium businesses, or a large number of hardware deployments across labs and data centres. They also help to reduce hours of controlled air conditioning chilling, which obviously ultimately helps save on operational expenditures and lowers the overall power usage effectiveness (PUE). Key features include their ability to:

  • Manage high temperatures and humidity levels - Even up to 45°C/113°F at a 29°C maximum dew point.
  • Meet air quality standards - Uses clean outside air in both air-side and water-side environments.
  • Facilitate deployment of chiller - less data centres to almost anywhere – Where there are relevant climate conditions.
  • Be able to operate all year-round.
  • Reduce operational costs.
  • Lower IT environmental impact.

InRow Cooling

Using the very latest technology, in row cooling is purpose built and directly cools the racks. By separating the rack and the air conditioning unit, the data centre heat management is optimised, resulting in increased reliability and more design freedom in the layout of the data centre. Perfect for restricted spaces, or where there is an absence of a raised floor, or where there is fluctuating server rack loads; this approach can address challenging situations and work with existing server technology. Compact and suitable for a variety of racks from different manufacturers, it can also be easily adapted to modernise cooling systems in existing buildings, while being:

  • Adaptable: intelligent air flow system that self-adapts to changing conditions
    • Suitable for small and medium data centres with either raised and non-raised floors, and rooms with low ceilings
    • Works equally well in contained and open environments for either hot-aisle or cold-aisle capture
    • Air, water, glycol and chilled water systems available
  • Flexible: four different cooling systems are available, each in a variety of sizes (up to 40KW) with indirect free cooling:
    • A/AS-System – direct expansion
    • GS-System – direct expansion and plate condenser
    • GES-System – direct expansion with indirect free cooling
    • CW-System – chilled water cooling
  • Precise: targeted cooling of high-density racks, the horizontal air conduction means the cold air takes the shortest route to reach the rack, Automatically balances the airflow and cooling capacity depending on need
  • Effective: delivers cooling close to the server heat source for efficient and effective data centre heat management
  • Variable: featuring adjustable speed EC plug fans and flexible capacity digital scroll compressors
  • Controllable: provides 24/7 precise environmental control for cooling, humidity control and air filtration, Ability to monitor and control all the components inside and outside the unit to improve performance and report rack temperatures, Independently controlled 5 speed fans to enable system to respond to differing air temperatures
  • Accessible: designed and built for ease of maintenance with access from the front or rear of unit
Critical Power Supplies - InRow cooling diagram with hot and cold air intakes

Server Room Design

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