Chilled beams add to cooling capacity for Nationwide headquarters

Published:  10 August, 2004

To meet increased cooling loads at its Swindon headquarters, Nationwide has supplemented its VAV air-conditioning system with high-capacity chilled beams.

Chilled beams have been used in the headquarters of Nationwide at Swindon to supplement the cooling capacity of an older VAV system with minimal structural work and disruption. The solution was designed by consulting engineers Building Management Technology to meet increased cooling loads.

The Croft Campus was purpose built over 10 years ago. The increased use of IT at workstations and reduced dependence on paper storage have led to more people working on each floor. The result has been an increase in cooling loads that the existing VAV system could not handle.

Roger Lott of BMT explains, ‘Nationwide wanted enhanced cooling, as well as improved reliability for its business-critical systems — all to be achieved without structural alterations. However, with limited riser and plant-room space available, we could not simply extend the VAV system. Instead, we decided to make better use of the spent chilled water coming from the air-handling units serving the VAV system.’

This chilled water is passed through Krantz high-capacity chilled panels suspended from the floor plate above the ceiling. One floor plate is being evaluated this summer, before a decision is made to continue with the rest of the building.

The chilled panels can meet 35% of the maximum cooling load, which is a requirement all year round. The VAV system is used less throughout the year, while the overall cooling capacity is increased.

BMT initially considered using chilled-ceiling units laid into the ceiling, but the number of units required would have left no access for maintaining the VAV system. Fewer high-capacity chilled beams are required, and they are suspended close to the slab, leaving space below for access to other equipment in the ceiling. The chilled panels themselves have no maintenance requirements.

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!

Construction Week



  • Field Sales Executive

    Successful professional technical salesperson required to sell to consultants and contractors. Unique opportunity to sell ultra-low energy, patented technology, ventilation products from a UK manufacturer. ...

  • Property Surveyor

    Property Surveyor/ Building Service Surveyor needed to work within the Technical Services team for the management of water hygiene/ legionella risk within DCC's property portfolio. We are looking for an experienced and dynamic team member to join our T......

more jobs »


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