ESB Offices – Fitzwilliam Street

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Facts

Location	Client	Cost	Size	Completion
Fitzwilliam Street Lower, Dublin, Ireland	ESB	€150m	45,000 sqm	2022

Project details

This is a set of two new office buildings within a single city block.

The ESB’s offices are an exemplar of sustainable design, offering a treasure trove of new design techniques for the next generation of low energy offices. The second office is a commercial implementation of many of the new techniques used within the ESB’s offices and provides the market with a real alternative the traditional, sealed office.

The buildings use a new form of hybrid ventilation that takes advantage of the exceptional natural cooling potential available in Ireland while providing an office space with an environmental space quality that exceeds that of traditional ventilation options.

The buildings contain an abundance of new passive and active sustainable design techniques, many of which are completely innovative and new to the office market.

The design team took a personal interest in the project and worked diligently to ensure that a unique building was achieved that is likely to stand as precedent sustainable design for many years

Research

BDP embraced the offices as a research project that reimagines every traditional system within an office and produces new techniques that enhance energy performance, space comfort and quality. BDP are currently monitoring and tuning the building and results will be published on completion of the monitoring period.

The building contains new techniques in the following areas:

Hybrid ventilation and free cooling, reduce active cooling close to zero
New fresh air delivery techniques result in approximately 85% less fan energy
New air delivery techniques for meeting rooms reduce energy usage dramatically
Single coil fan coils reduce fan and embodied energy
Heating energy usage approaches zero and is provided almost entirely from recovered heat
100% of domestic hot water is provided from recovered heat
Free cooling is provided from a ground loop system
Advanced phase change material stores free cooling potential
A glycol free cooling system reduces waste and improves efficiency
Demand controlled kitchen ventilation with heat recovery is used
A plethora of new energy and comfort control techniques are used
Air quality is enhanced and monitored by active VOC meters

In addition to the new methods used, the building is a zero pollution, zero fossil fuel building that includes best practice techniques in water conservation and biodiversity. The building is also BREEAM Excellent certified for its approach to holistic sustainability.

The research work has resulted in significant insights into the design of future office buildings and our engineers have already implemented further refinements of the techniques within our future projects.

Brief

provide a set of office buildings with an environmental performance that exceeds that of any similar scale office in Ireland, setting a precedent for future office design

Results

playing an active role in the development of building layout and facades to optimise its passive response
development of a range of active and renewable energy and water systems for the building
irish Building and Design Awards 2022 - Irish Building Project of the Year award
irish Construction Industry Awards 2022 - Large Commercial Project of the Year