james cook university hosptial, Rooftop Air Handling Units


Project Info


Mechanical, Electrical







What We Did

Completed in 2017 and working directly for the client, the project to remove and replace seven air handling units (AHUs) situated within a rooftop plant room. The competitively tender works was valued at over £645,000.

Being a maternity unit, continuity of services provision was a vital requirement; along with the need to liaise with the client and ensure the site remained safe, quiet and fully operational. The large L shaped plant room located on the roof of the single-story building presented logistical challenges due to restricted height access to site, and the fact that the heavy AHUs were over six metres long.

Geoffrey Robinson engineers designed and manufactured a temporary AHU, which enabled the sequential replacement of all old units, whilst maintaining temperature-controlled air to the maternity unit.

The project also included the replacement of 42 manual smoke/fire dampers with COLT automatic fire sensors, this, along with the AHU required substantial ductwork fabrication, cleaning and reconfiguration.

The installation of the new electrical distribution included a Schneider MCCB panel board, submain cabling, and UPS system. All to HTM NHS standards.

Services Provided

  • M&E principal contractor
  • Project management and programming
  • Replacement of 7 AHUs and 42 COLT automatic fire dampers
  • Schneider MCCB board, fire alarms, all M&E infrastructure, UPS
  • Pipework, fabrication, valves and associated thermal insulation