Subscribe to newsletter

Submit Article


Editors Note: Advanced Air provide:

  • Fan coils

  • Chilled beams

  • Air diffusers

  • Smoke dampers


Advertise Here

Request Quote

CPD Seminar


Advertise Job

Advertise Job

Terms & Conditions

Terms & Conditions

Contact Building Design

Contact Building Design

e-mail Building Design

e-mail Building Design


- Building Design - Services & Construction Products Index

Request Information

Links Page



ADVANCED AIR - Major Changes For Fan Coils And Chilled Beams

With the development of high efficiency fan coils the terminal air conditioning market is going through a major change. Andrew Sargent, General Manager Advanced Air, comments.

Since chilled beams were introduced to the UK market in the mid 1990’s their popularity has increased mainly at the expense of fan coil systems. It probably comes as no surprise to find out that the energy credentials of chilled beams were far superior to those of fan coils. Up until recently chilled beam manufacturers were able to demonstrate a 15% - 20% saving in total building carbon emissions compared to the conventional ac constant speed fan coil units.

With successive building regulations increasing the focus on carbon emissions chilled beams became very popular as indicated by our marketing figures given in Table 1.

Table 1
                                                Chilled             Fan
                                                Beams             Coils                VAV
1997                                           1                    40                    10
2007                                          30                   30                      2

However fan coil manufacturers have now developed a new generation of highly efficient units which utilise the new technology in the form of ec motors. These motors have reduced average specific fan powers by factors in excess of 5 as per the graph in Figure 1. A further benefit of the ec motor is that you can vary the speed which gives variable air volume (VAV) and further significant savings in energy.

A further increase in the fan coil energy efficiency can be made by improving the fan deck design. Traditionally a vertically mounted centrifugal fan has been used, and to keep the fan coil height to a reasonable dimension so that it could easily fit into the ceiling void multiple small (low height) vertically mounted fans were used. The European ec fan deck has up to 5 motors each with their individual fan.

These fan decks are normally “bought in” by the fan coil manufacturer either from the motor supplier or another manufacturer. At Advanced Air we design and manufacture our own fan decks which means that we can adapt the fan configuration quite easily. We also have a strong working relationship with our American based ec motor manufacturer with full access to his R & D facilities. By combining the expertise of both companies we were able to develop a unique fan deck with only one fan horizontally mounted as per Figure 2. This innovation gave us a much lower SFP and a more efficient fan coil which neutralises the carbon emission argument between the two systems.

This has had a profound effect on the increased interest in these highly efficient fan coils because “deep down” if seems that the consultant prefers fan coils to chilled beams. There are of course compelling reasons to use ec/VAV fan coils instead of chilled beams and the main issues are:-

Unit Price/Installed Cost – here the fan coil wins easily with the unit cost comparison making fan coils up to half the price of chilled beams. When looking at installed costs there are still significant savings when utilising fan coils.

Spacial Flexibility – with spec office buildings forming a major part of the market, flexibility for the developer means that letting the space is much easier with fan coils if partitions are moved and the system needs some modification. This can easily be carried out in the ceiling void and the worst case would be blanking/moving/activating diffusers as required. With chilled beams it is a major problem to change them and partitions normally have to be erected in predetermined positions.

Heating – virtually all fan coils are supplied as 4 pipe heating and cooling units, chilled beams are normally supplied in cooling only with low level heating coming typically from trench heating which can add to the cost and reduce the letable space.

We are already seeing a major swing to fan coils and I believe the proportion of systems will rise from 60% 40% to 90% 10% in favour of ec VAV fan coils. Chilled beams will therefore have a very much reduced market size and will predominantly be the exposed multi service type of systems.

Action Storage Lockers BBCs DIY SOS Devon News 280311

Airedale High Efficiency DeltaChill FreeCool Chiller News 010411

Armstrong Ceilings Infusions Canopies Splash Stockton News 280311

Atlantic Boilers Boilerplant The Belfry Hotel Warwickshire News 010411

Cablofil Cable Management Weston Super Mare News 010411

CED Natural Stone Products Irish Depot Omagh News 280311

Chiltern Free Technical Information Historic Buildings News 300311

Cosentino 10 Year Warranty Eco Worksurfaces News 300311

Daikin Altherma Heat Pumps Ideal Home Show News 290311

Daikin Opens East Anglia Training Centre News 010411

Daikin Statement On Japanes Earthquake News 300311

Dow New Polymeric Flame Retardant Technology News 300311

Eaton Electric Exhibit Electrical Trade Fair Belfast News 010411

Elliott New Training Centre Tube Lines London News 280311

Emerson Chloride UPS Energy Efficiency Tax Break News 290311

ENER G Launches Tamper Proof BEMS News 300311

Formica Richard Crisp Appointed National Sales Manager News 290311

Formica Woods High Pressure Laminates Range News 280311

Hanson Formpave Aquaflow Permeable Paving Cape Town News 290311

Harlequin Dance Injury Researcher Luke Hopper News 290311

Harlequin Exhibit At PLASA Focus 2011 News 280311

Ideal Standard ArchiModule Modular Fixture Technology News 010411

Ideal Standard EdenWave Water Wave Vibration Bathing News 300311

Ideal Standard eVision Digital Control System News 310311

Ideal Standard Launches Furniture And Accessories Ranges News 290311

Ideal Standard Launch Range Of Showering Solutions News 280311

Impey New Managing Director Martin Carroll News 280311

JS Air Curtains Intensse Air Curtains St Barnabas Worthing News 280311

Knauf Drywall Construction Contracts Commonwealth Games News 2014 300311

Knauf Insulation Wall Insulation Barn Home Farm News 310311

Levolux Solar Shading White River Place St Austell News 280311

Marley Launches Acoustic Soil And Waste System News 280311

Marshall Voltis Optimiser Public Sector Contract Wins News 010411

Mumford Governments Green Deal English Heritage News 010411

Mumford Timber Windows Doors Conservation Award News 300311

Optima Partitions O2 Flagship Building Slough News 300311

Polypipe Publication Terrain Furze Terrain Firetrap News 310311

Signs Of The Times Boundary Signs For Skegness News 280311

Steadmans Composite Panels New Office Development Cumbernauld News 280311

Terasaki New DIN Modular Protection Devices News 310311

Weatherite Building Services Hinxton Hall News 310311

West London Security CCTV Monitoring Lambeth College News 280311

West London Security Fire Alarm Systems Halcrow News 300311

News Categories:
Fan coils Chilled beams Air diffusers Smoke dampers

Arundel Jones Associates Ltd
Hill Farm Business Park, Linton Hill, Maidstone, Kent ME17 4AL
Tel : 01622 745333

See also:

| BuildingDesign Directory | BuildingDesign Tenders |

|BuildingDesign News Archives | 2006 | 2007 | 2008 | 2009

| BuildingDesign Recruitment | AJA Part Time Jobs Board |

© 2010 copyright all rights reserved Registered in England and Wales No. 07334149