Close Control Air Conditioning

Holborn is about so much more than just comfort cooling. We have the experience and expertise to design and deliver precision air conditioning systems that regulate humidity and temperature, down to the last tenth of a degree.

These systems are ideally suited to environments housing sensitive technology, like data centres, computer rooms, switch rooms, telecommunications suites and laboratories. We understand these critical centres of operation must cope with varying cooling loads and perform consistently under all conditions.


If things go wrong, you can be sure we will have specified the appropriate back up and standby resilience needed to avoid interruptions to your service. And our engineers understand the importance of precision when dealing with close control air conditioning systems, with all works designed in-house, in accordance with CIBSE, HVCA, NIC EIC & Building regulations part L.

We undertake every aspect of critical cooling installations, from design and build, including mechanical & electrical (M&E) and builders works, taking on the role of principal contractor when appropriate.

Recognising that unlike comfort air conditioning, close control systems must operate continually, every hour of every


  • Direct expansion / chilled water systems / dry coolers
  • Systems that operate with free cooling
  • Full fresh air cooling
  • High density cooling either via chilled water or air distribution
  • Floor plenum pressurisation systems and active floor solutions
  • Integration of the new system into existing infrastructure
  • Latest energy efficient solutions to include EC fans, load share systems
  • Experience of providing bespoke cooling solutions to specific environments
  • Utilisation of web based control / monitoring and interrogation of systems

Our experience allows us to design and install precision air conditioning systems that balance air cleanliness and distribution, with heat ratios, temperature cycling and relative humidity, to provide the optimum protection for your equipment.