Heathrow Terminal 2A | HVAC Commissioning | Water Treatment

Service: HVAC Commissioning & Water Treatment

Project: Heathrow Terminal 2A

Client: Crown House Technologies & Laing O’Rourke

Cleartech Group Ltd were engaged by Crown House Technologies and Laing O’Rourke to complete the HVAC commissioning and water treatment services for the Terminal 2A at Heathrow Airport in London. Crown House carried out the £100 million mechanical and electrical works contract for T2A, on behalf of HETCO, and the construction project as a whole cost around £2.5 billion to complete.

Project overview

Scope of Works:

  • Commissioning Management
  • Balancing of the primary & ancillary LTHW & chilled water systems
  • Balancing of ventilation systems
  • Commissioning of the domestic hot and cold water systems
  • Sterilisation of the domestic hot and cold water systems
  • Commissioning & testing of RPZ valves


Cleartech’s Approach

All of our balancing works were completed in line with current CIBSE codes. Furthermore, our water treatment works adhere with ACOP L8 and BS5885, as well as, WRAS Approved RPZ testers for the RPZ valves. A total of 2000 commissioning stations and measuring devices were balanced and a total of 120 AHU’s serving 5000 terminal units.

Our commissioning management services included overseeing and assisting with the co-ordination of all commissioning works – including the compilation of a commissioning program, completing commissionability reports on all systems to be balanced and witnessing all systems once fully commissioned or balanced. These works were carried out in order to ensure that the systems were of an acceptable level as per C.I.B.S.E code ‘A’ and ‘W’, as well as, all relevant BSRIA guidelines.

You can read more about the development of Heathrow Terminal 2 by clicking this link.

For further information and advice on HVAC Commissioning and Water Treatment, or to get a quote, call us today on 01698 682000, send an email to [email protected] or submit a contact form on our website.

Click the graphic to view or download the Heathrow Terminal 2A case study.
HVAC Commissioning