hvacCRAC units monitor and maintain the temperature, air distribution and humidity in a data center or other mission critical location. This is essential as the kinds of equipment found in these locations (such as UPS power equipment, server racks, etc) can reach levels of heat that jeopardize your unit stability. The main purpose of any CRAC unit is to make sure your equipment doesn’t overheat and run into problems small and large.

One popular buildout for a computer room is using Downflow CRAC units to push cool air underneath raised access flooring. Computers and racks are placed about two tiles apart, with their air intakes facing each other. As the CRAC unit pumps cool air through the perforated floor tiles, the racks intake the air and exhaust hot air into the opposing hot aisle. CRAC units then pull in the hot air and release it underneath the floor tiles, making a complete cycle. Another option, Upflow units, uses a similar model but with the room’s ceiling.

What system should I use?

In addition to choosing whether to go with a ceiling mounted system or a floor mounted system, another important choice is what kind of CRAC cooling you want to use. There are five basic types including air cooled systems (2-piece), air cooled self-contained systems (1-piece), glycol cooled systems, water cooled systems, and chilled water systems. Each basic type has advantages and disadvantages, more about which you can read here.

Why go with a used CRAC system?

The systems we sell primarily come out of working data centers. Sometimes a recently upgraded or expanded data center discovers that the tonnage of cooling they’re using is insufficient to keep cooling. Instead of adding a new CRAC unit, they may upgrade to a larger tonnage. The older system is in perfect working condition, but is just too small to power such a large facility. We will bring these units in and test them to make sure they’re sound and working.

We offer refurbished and remanufactured units. A refurbished unit will be tested, and comes with new relays, belts and filters. A remanufactured unit will come with zero hour compressors, new relays, belts, bearings, filters, condensate pump, and will have a fresh coat of paint. Units can be purchased with extended warranties. Please call us to discuss the options.

Save a lot of money and get a great working CRAC unit that meets your specific cooling needs.


(4) DS105A Liebert AC – 30 Ton, Air Cooled, Downflow
Model: DS105AUA001283A
Year: 2006

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10-Fan Liebert Dry-Cooler DDNT1820ACFSGAS
Year: 2000

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trane chiller 1

100 Ton Trane Chiller
Model: CGAM100

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15 Ton Liebert AC Air Cooled, 2007, DH199A
Model: DH199A-AAEI9707
Year: 2007

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20 Ton Liebert AC Glycol Downflow with Econocoil, 2004, 460V
Model: DE240GHAAEI
Year: 2004

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Delta AC 1

22 ton Data Aire DX AC – Primary: 480V
Model: DAAD-2634
Year: 2010

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3 Ton Liebert Upflow AC, Water/Glycol, 208V, 2011
Model: BU046WSCD00426A
Year: 2011

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30 Ton Downflow Glycol Liebert HVAC DH363GUAAEI
Model: DH363GUAAEI
Year: 2000

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APC ACRC100 Chilled Water ACs
Model: ACRC100

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Downflow 30 Ton Air Cooled Liebert CRAC Units
Model: DH380A-AAEI
Year: 2006

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Liebert 20 Ton Downflow Air Cooled DS070A CRAC w/ Condenser
Model: DS070AGA0EIA

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Liebert 30 Ton Upflow Air Cooled VH380A VS105
Model: VH380A
Year: 2005

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Liebert Upflow DX VH199AU 15 Ton Air Cooled CRAC Unit
Model: VH199AU
Year: 2000

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Liebert Upflow DX VH290A 22 Ton Air Cooled CRAC Unit
Model: VH290A-AAEI
Year: 2003

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Liebert Upflow VH245AUAGEIS610
Model: VH245AUAGEIS610
Year: 2007

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