75 St Stephens Green, Dublin

SAS CoolCeil chilled ceilings have been specified throughout the six floors of a prestigious new development in the heart of Dublin’s central business district.

Key features




Shelbourne Developments


Burke Kennedy Doyle and Associates

Main contractor

Homan O'Brien


SAS International

Completion year


System type

Radiant Chilled Ceilings

Area M2




Product Groups

Formerly known as Colmstock House, 75 St Stephen’s Green has benefited from extensive refurbishment and extension work. The building now boasts nearly 10,000m2 of state­of-the-art office accommodation.

Architects Burke Kennedy Doyle and Associates used SAS CoolCeil chilled ceilings throughout all six floors. Homan O’Brien Associates were the M&E Consultants for the project.

The existing building had a low floor to ceiling height compared with modern buildings and the developers wanted to maximise the feeling of height within the space.

An innovative cooling solution was required to allow a finished floor to ceiling height of 2700mm with only an 85mm zone available below the coffered slab.

“We worked with SAS to design the first chilled ceiling system to be installed within an 85mm zone and offer an energy efficient solution when compared to more traditional air-conditioning systems” commented Simon O’Brien, Joint Managing Director, Homan O’Brien Associates.

Bennett Construction, Main Contractor, championed SAS International to the professional team as prefabricated tiles with the chilled element bonded to the rear of the metal ceiling tiles could be manufactured and supplied.

Because the original structure was left in place the building grid was non-standard and the chilled ceiling panels needed to be manufactured by SAS International to bespoke dimensions.

The panels feature a perforated surface, which allows sound to pass through and be absorbed by the acoustic pads in the rear of the panel.

Installing the chilled ceilings meant overcoming some challenging on-site difficulties. Noteworthy was the hollow-pot construction of the ceiling slab. This meant that special fixings had to be used in the concrete, the lengths of the chilled ceiling supporting rods were different at each edge of the panel. In some instances distances between the top of the panel and the ceiling was less than 85mm.

The 1960s development was occupied by the Irish Justice office until 2004, when it was acquired by Shelbourne Developments for €52.3m. Over two years were then spent redeveloping the building.

Considered to be one of Dublin’s most prestigious addresses, the buildings surrounding St Stephen’s Green are occupied by global corporations and Irish Government departments.

The broad expanse of this development faces the Green the secluded Iveagh Gardens are found to its rear. The speculative nature of this project has proved successful with over two thirds of the space already occupied in this landmark building.

Systems used