Case Study – GSK and Johnson Controls

Partnering to reduce the carbon footprint of a global R&D hub
When GlaxoSmithKline (GSK) were refurbishing their global R&D hub in Weybridge, they asked Johnson Controls to provide a new air conditioning system that would provide better fine control and reduce their carbon footprint. Building on a long-standing partnership, Parasense worked with them to implement refrigerant leak detection systems that ensure any refrigerant leaks can be immediately identified and remedied.

Efficient air conditioning

To provide a comfortable and productive working environment, air conditioning at the GSK hub needed to overcome significant solar gain at peak times, as well as coping with the changing demands of a flexible, open-plan working space.

The new system comprises 48 air conditioning units, supplied by four inverter-driven chillers, using R410A refrigerant.

Refrigerant leak detection

GSK is committed to cutting environmental impacts and recognised the importance of minimising loss of refrigerant from cooling systems.

Based on a 15-year partnership, Johnson Controls specified Parasense refrigerant leak detectors, which have a proven ability to identify even the smallest leak, long before any significant amount of refrigerant can escape. Two 16-channel GRM2 infrared refrigerant leak detection systems are covering 128 detection points across 52 critical assets, including the fan coil units and the roof-mounted condensers.

The Parasense equipment is integrated with the building management system (BMS) to maintain a single point of control for facilities management.

Delivering the project

Parasense engineers worked alongside colleagues from Johnson Controls to install, calibrate and commission the refrigerant leak detection systems within the scheduled project timeframes.

Full documentation and evidence of compliance was provided in advance of the client handover.


The new air conditioning and refrigerant leak detection systems are ensuring a comfortable working environment while supporting GSK’s aim of reducing emissions of CO2 and other greenhouse gases.

The solution is ensuring compliance and best practice for the F-Gas regulations and BS EN 378.

Next steps

You can also download this case study as a 2-page pdf. To find out more, please see our refrigerant leak detection products or contact us on 01452 724123.