After a fire in a kitchen exhaust system in Heathrow Airport that spread through 200m of exhaust ductwork to a plantroom, BAA led a technical review to improve safety. This review identified the cause was a result of a grease build up and the outcome was the requirement of a new fire resistant kitchen extract ventilation system.
Exyte Hargreaves were appointed to manufacture and install the new fire rated kitchen extract ventilation system. All of the uninsulated single skin kitchen extract ductwork was removed and replaced by the fully tested Hargreaves HFD/ KE 100 kitchen extract fire rated ductwork for the kitchen ventilation systems.
The tight on-site programme was aided by use of HFD/KE ducts which were installed in a single process. The factory fitted insulation in the double skin armoured duct protects from site damage and contamination. This was an important factor for the specifying engineers Crossley Associates as they were concerned that alternative wrapped systems would have taken longer to install and may have been prone to damage and degradation.
The Exyte Hargreaves system was installed with ports at 1.5 metre centres for inspection and cleaning so that grease build-up can be monitored and prevented.
As a result of the new the new fire rated kitchen ventilation system BAA said ‘Heathrow‘s 60 million annual passengers and 57,000 staff will now operate in an even safer and secure environment.“