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Completion of server room air conditioning project for Fibrefab 2012


Orion air conditioning and refrigeration limited has completed the installation of a replacement server room air conditioning unit for Fibrefab in Haverhill. The existing wall mounted air conditioning unit had failed due to old age, it was installed in 1999 and had worked continuously without any major issues since installation. Mitsubishi Electric air Conditioning is renowned for long reliable life and are ideal for server rooms and coms rooms were a failure can mean the complete shut down of an entire business. The old air conditioning unit was on R22 refrigerant which is banned for use in the UK as from 2015. The new unit is a energy efficient inverter system which has a high COP and modulated inverter compressor which can save up to 40% on server room air conditioning that will run 24 hours / 7 days a week.



server room air conditioning unit in Fibrefab Haverhill with servers in the background  server room air conditioning unit with controller

server room outdoor air conditioning unit installed outside of building with basic cage system


What air conditioning unit was installed in FibreFab:

1 x  Mitsubishi Heavy Industrial - SRK63ZE-S1 Wall Mounted (6.3kW 21000 Btu) HYPER-INVERTER Air Conditioning units which provided enough cooling for the 5 meter area in the server room. These units have a amazing COP (3.65 initial input on SRK63ZE) which means that every 1000w of electrical energy going in produces 3650 watts of cooling.


Server room air conditioning efficiency and CO2 emissions:

This air conditioning system, because slightly oversized for the area took around 10 minutes to cool fully but once cool the outdoor inverter units slowed down because the temperature  had been reached therefore just pumping small amounts of cooling in to maintain the server room. 



Server room efficiency: 85%
Total power of servers: 5000 Watts
Total heat loss: 750 Watts@85%
Room in Square Meters: 1800 Watts
Total Heat Load: 2550 Watts
Key points to think about when getting air conditioning for server rooms
  • Use inverter air conditioning as it will save energy in the long run.
  • Cheap air conditioning units do not work in cold weather because they do not have a outside fan speed controller (low ambient kit)
  • Use a established brand so if a part fails on you Server room air conditioning you are not waiting 8 weeks for a part.
  • Sometimes it is worth having two server room air conditioning units because if one fails you still have some cooling.
  • To establish the heat load of you servers add up all the power supplies of your servers rack and assume a 40% loss to heat. i.e- If you have 10 servers with 400watt power supply the total watts will be 4000 watts. assuming a 40% loss the heat load will be 1600 watts.
  • Work on a average watts per/Msq of 125watts, so if you server room is 5 x 5 meters you will require a base of 3.5kw/12000btu + the heat load.
  • Advised manufactures for server room air conditioning Mitsubishi, Daikin, Fujitsu, Sanyo.
  • Always use auto-restart units for server room air conditioning units as power failures can shut budget air conditioning down.
  • If your server room is temporary (ie short term lease on building) or has building restrictions then portable air conditioning maybe your only option.
  • If using portable air conditioning for your server room then make sure it recycles the water for better cooling performance of that it has a integral condensate pump.
  • Use a established business who will not be going out of business for your server room air conditioning installation as the warranty of the air conditioning is with the supplier not the manufacturer.

We offer a complete service to IT Managers, Building Managers and Server Room / Computer / COMS room managers. Call us for a comprehensive quotation on varied air conditioning manufactures to suit any budget on new installations. We have worked with many Blue-chip organisations in helping them develop their server room air conditioning.


Call: 01234 841221  for details on server room air conditioning installations.


E-mail: [email protected]






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                               Last updated - 13/02/2020