Underfloor air conditioning provides solution for building refurbishment

Published:  18 May, 2009

By requiring a floor void only 200 mm deep, AET’s PleinAir VAV underfloor air-conditioning system is well suited to refurbishment projects with limited ceiling heights.

To meet the particular requirements of refurbishment projects, Advanced Ergonomic Technologies has launched an all-air VAV underfloor air-conditioning systems

. The PleinAir ductless terminal system provides air conditioning via a floor plenum that need be only 200 mm deep, suiting it to refurbishment projects where height limitations prevent the installation of deep ceiling voids.

One of PleinAir’s key selling points is the delivery of free cooling when used with roof-mounted all-air central plant. Free cooling is available when the ambient temperature is less than 15°C — 80% of the year, on average, in western Europe.

High-induction floor grilles provide up to 16 different air patterns of varying intensity via move­able passive tile units (PTUs) with a low terminal pressure of 7 to 12.5 Pa. PleinAir is said to be one of the most energy-efficient cooling systems available, with a reduction in running costs of 14% compared to a conventional fan-coil system.

PTUs can easily be moved to cope with office churn. The system works like displacement ventilation, with hot air accumulating above head height and extracted. This approach reduces the cooling requirement of air supplied to the space.

In heating mode, PleinAir heats room air before introducing it back into the space.

For more information on this story, click here: May 09, 85

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!


  • Compliance Manager

    Working in the Estates Facilities Management Hard Services Team, directly line manage the Compliance Team of 8 staff. Ensure University building services and infrastructure are legally compliant and fit for purpose, to enable research, teaching and learn.........

  • Estates Project Manager (NHS)

      Working as part of the Hampshire Hospitals NHS Foundation Trust   Estates team, you will be responsible for developing capital projects from feasibility studies, through to delivery of refurbishments, backlog maintenance schemes and new builds. .........

more jobs »


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