Passively reducing carbon footprint

Published:  12 October, 2009

Passivent natural ventilation meets refurbishment in Sheffield.

Contributing to the improved energy efficiency of a refurbished 1960s office 4-storey office block in Burngreave, Sheffield, is the application of Passivent natural-ventilation techniques. The systems ensure a fresh yet quiet internal environment in what is designed to provide a landmark building to act as a catalyst for the 10-year regeneration programme.

The refurbishment also includes a fully glazed twin-wall facade and biomass solid-fuel heating system.

Passivent Aircool window ventilation inlets in the glazed facade allow fresh air into the 3500 m2 of offices using natural pressure variations. They also attenuate outside noise.

Some 25 suspended-ceiling louvres also use principles of natural air movement to distribute the fresh air throughout the building.

The twin walls of the facade glazing and internal vertical ducts create a stack effect to encourage warm air to rise and be exhausted via four Passivent Airstract high-capacity terminals on the roof and 10 terminals above the twin-wall facade.

By operating continuously, the natural ventilation provides free cooling at night. Such systems have been shown to reduce energy consumption by up to 50% compared with air-conditioning. They also yield 15% savings on capital costs and 75% on maintenance costs

For more information on this story, click here: Oct09, 86

comments powered by Disqus



Welcome to Modern Building Services Online, the web edition of Modern Building Services (MBS) journal and the UK's most popular Building Services engineering site. Modern Building Services covers the entire Building Services Engineering industry. This site contains archived content from the journal, plus web-specific content.

When you go to our digital edition, you can also access the archive of digital editions.


Modern Building services has a group
on Linkedin - join us!


  • Energy and sustainability: Performance and analysis manager

     An exciting opportunity will arise shortly for an exceptional person with extensive experience of managing sustainability within large complex organisations. Can you demonstrate extensive experience of energy management, proven ability to drive program......

more jobs »


"Is the Building Services industry lagging behind in the implementation of BIM?"