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Premier Inn – Tolworth


Whitbread Group PLC

Hotel development complete with car parking, close to Epsom Downs & Chessington World of Adventures, with ease of access to the tube station.

Project description

With safety of utmost importance, the contractor chose to employ specialist Ventguard system for both the smoke and car park ventilation.

Car Park

With a car park area of 1500m2, NSP employed 2 50N induction fans with a combined total of 11m3/s extraction rate via 2 EN12101-Part 3 compliant smoke extract fans. The system offered the client the benefit of omitting the 0.4m2. In its place a negative pressure differential system was deployed to keep the stair-core free from smoke ingress.

Smoke Ventilation

2 stair-cores were protected with Ventguard systems.

A mechanical smoke ventilation system complete with a 5m3/s duty/extract fan set was also provided by NSP and successfully installed ensuring the correct flowrates were achieved on each level via smoke dampers. This was made possible by the builder providing a near air-tight shaft construction. CFD modelling was carried out and proved our system effective at keeping the stair-core clear from any smoke ingress.