Smoke Control for the Home Office


In the design of the U.K. Government’s new Home Office headquarters, an effective, well-designed smoke-control system was essential, being that each of the facility’s three buildings contained full-sized atria.

Specified by an M/E team from Flack + Kurtz, U.K., fans are connected to each of the atria roof plenums with a capability of extracting a total volume of air equivalent to four air changes per hr. in the atrium and a single largest floor.

The uppermost two levels of offices in each building are separated from the atrium via full height glazing to create a smoke reservoir in the atrium. Motorized automatic fail-safe closed vents were also provided in the glazing.

Upon activation of the fire-alarm system, the vents to the atrium on the uppermost two floors will close, and one of the atrium smoke-extract fans will be initiated to allow venting of staircase pressurization air from the fire floor.

For air make-up to the affected floor plate, self-opening window vents are provided in the perimeter of the fa%%CBOTTMDT%%ade.

The lower ground floor is provided with a separate smoke extract system with duty and standby extract fans located at the roof level of each building.

The group of rooms and areas served from each system are linked with fire-rated ductwork and motorized isolation dampers (MSD). Extract fans are capable of operating continuously at 300°C for one hour.

Upon activation of the smoke sensor affecting a particular area, the MSDs to the unaffected area of the system close and the MSDs located in the smoke-affected section open, allowing automatic extraction at the rate of 10 air changes per hr. in the smoke-affected part of the system.

The make-up air is provided by a door that’s manually opened by the fire brigade and automatic operation of the HVAC supply system.

For a complete story on the Home Office see “New Home for the Home Office” in the March 2005 issue of CSE .

Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Exploring fire pumps and systems; Lighting energy codes; Salary survey; Changes to NFPA 20
How to use IPD; 2017 Commissioning Giants; CFDs and harmonic mitigation; Eight steps to determine plumbing system requirements
2017 MEP Giants; Mergers and acquisitions report; ASHRAE 62.1; LEED v4 updates and tips; Understanding overcurrent protection
Power system design for high-performance buildings; mitigating arc flash hazards
Transformers; Electrical system design; Selecting and sizing transformers; Grounded and ungrounded system design, Paralleling generator systems
Commissioning electrical systems; Designing emergency and standby generator systems; VFDs in high-performance buildings
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me