Cheevers Court & Haliday House, Dún Laoghaire

On time and on budget, Kerrigan Mechanical overcome Covid-19 challenges to hand over two developments within 17 months…

Kerrigan Mechanical has successfully handed over its state-of-the-art district heating schemes for Cosgrave Developments’ nZEB apartment schemes in Dún Laoghaire.

Commercial heating experts, Kerrigan Mechanical worked simultaneously on sister blocks Cheevers Court and Haliday House to install all mechanical works on time and within budget.

Consisting of 368 apartments, two gyms, concierge and two common areas, these developments each feature an independent district energy centre and meter reading system.

The move to Nearly Zero Energy Buildings (nZEB) is part of the climate action plan aimed to help us achieve our target Carbon reductions and ultimately achieve Net Zero by 2050.

nZEB describes buildings that have a very high energy performance in which the nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, which are produced on-site or nearby.

Kerrigan Mechanical was able to achieve nZEB compliance by installing renewable sources of energy in its primary plant room. The energy centre consists of one Hamworthy ModuMax Boiler, three Daikin Heat Pumps and three DACHs micro CHPs.

The other notable mechanical works included fire fighting dry risers, passive fire-rated ventilation and air conditioning to the gym.

“All apartments are equipped with a Danfoss Heat Interface Unit, which provides each tenant with instantaneous heating and hot water,” said Adam Dent, Contracts Manager at Kerrigan Mechanical. “Each dwelling also includes a Vent-Axia Heat Recovery Ventilation unit, which, together with the other components, complement each other and thus are the perfect solution for an A-rated apartment.”

Challenges on this project included the out break of Covid-19. “We had to rethink our install methods, splitting manpower into shifts and revising safety procedures in order to keep all staff in a safe working environment,” explained Adam.

“With that said, and with hard work from the Health and Safety and site teams, we still delivered both Cheevers Court and Haliday House in under 17 working months. The entire development eventually ran concurrently, with Halliday being the latter of the two. Kerrigan Mechanical was able to hand over Cheevers Court successfully and without disruption due to each block having an independent basement and plantroom. This meant that the first tenants could move in to a finished block, not a building site.”

High profile Located at the centre of the exclusive Cualanor development on the Upper Glenegeary Road in Dún Laoghaire, this high-profile nZEB project was one of the first of its kind in the area.

“This is a leading-edge project and like all Cosgrave Development jobs, only top quality products were specified. We used products that have been tried and tested by us.” Consulting Engineer Richard McElligott and Cosgrave Developments stated.

“This was our sixth district heating project for Cosgraves and the third that achieved nZEB compliance. It’s another great accomplishment for Kerrigan Mechanical and we are thrilled to be part of such environmentally friendly developments.

“Our relationship with Cosgraves continues to evolve in a positive manner. Not only have we delivered a Nearly Zero Energy Building for them, we have instilled confidence that we are a contractor that achieves dates while still achieving high standards and quality workmanship. We ensure there are no delays so the tenants can move in on time, as promised and as advertised.”

Products involved:
• Passive ventilation – SR Ventilation
• CHP system – Glenenergy
• Heat pumps – Daikin Ireland
• Pumps/heat interface units – Hevac
• Vent-Axia units – Lindab Ireland
• BMS system – Sygma Automation

Project team…
Client: Cosgrave Developments
Architect: McCrossan O’Rourke Manning
Consultant Engineers: McElligott Consulting Engineers
Mechanical Contractor: Kerrigan Mechanical

Kerrigan Mechanical,
Unit 3, Athboy Business Park,
Trim Road,
Co. Meath
T: +353 (0)46 94 30529

Lindab (Irl) Ltd

Lindab (Irl) provided the heat recovery ventilation systems and the smoke evacuation ductwork to Cheevers Court project…

Lindab (Irl) Ltd provided its Lindab Thor Duct fire-rated ductwork and Lindab Thor Duct fire rated smoke extract system to this project. Lindab Thor Duct has been tested to the latest EN and also British standards and is the result of 15 years’ of research and development.

Lindab (Irl) Ltd is a wholly owned subsidiary of Lindab Group based in Sweden. It is the largest supplier of ventilation equipment in Ireland and one of the largest in Europe with a group turnover of €1 billion with 5,000 employees.

Formed in Sweden in 1959, Lindab recently celebrated its 60th anniversary. It has been represented directly in Ireland since 2007, following an acquisition of an established Irish business. Lindab (Irl) is a partner of Vent-Axia Ltd, one of the most recognised names in domestic, commercial and industrial ventilation in Ireland.

Lindab (Irl) Ltd prides itself on customer service. Delivering its products to the market with high levels of customer service is a core value of the Lindab Group globally.

Kerrigan Mechanical is an important customer for Lindab (Irl) Ltd., and has worked closely with the firm on many projects over the years. Both companies have a real understanding of each other’s offering and capabilities, and work very well together. Lindab (Irl) looks forward to dealing with Kerrigan Mechanical long into the future.

Lindab (Irl) Ltd,
U2B, Nangor Road Business Park,
Nangor Road,
Dublin D12 W97P
T: +353 (0)1 456 8200


Hevac supplies advanced products for double nZEB project…

Ireland’s leading commercial plumbing and heating specialist, Hevac, supplied Hamworthy boilers, Jeremias Flue, Wilo, Danfoss HIU’s and pipe and fittings to nZEB Cheevers Court and Haliday House project for mechanical contractor, Kerrigan Mechanical.

The apartments’ entire heating and domestic hot water requirements are catered for in the HIU, with energy consumption monitored to allow each customer to pay for the heat they use in a fair and equitable way.

With a district heating system, as installed in Cheevers Court and Haliday House, there is no need to install gas pipes to each apartment. This removes the risks of gas leaks or explosions and carbon monoxide poisoning. Hot water is heated only when needed, and it heats instantly.

Karl Carrick, Director at Hevac explained, “Whether you just want to wash your hands or run several showers simultaneously, Danfoss HIU’s keep pace with the requirements. Instant DHW means never running out of hot water and, of course, there is no storage cylinder meaning stored hot water never goes to waste and valuable storage space in the apartment is freed up.”

The Hamworthy Wessex Modumax mk3 boilers are high-efficiency, condensing boilers with up to 95% gross seasonal efficiency. The mk3 upgrade has been developed in direct response to the increased use of wider delta T design methodologies in commercial buildings and district heating systems, such as Cheevers Court. Other benefits include lightweight, space-saving design and low water content to enable rapid response to heat demand.

Exclusively available in Ireland from Hevac, the Jeremias DW-ECO flue system is a twin-walled, factory-made, stainless steel chimney system with inner liner in 304 (gas and oil in dry conditions) or inner liner in 316 (solid fuel, biomass and condensing applications), a 25mm rigid rock wool insulation and a 304 outer liner.

Due to its superior design there are no hot spots or thermal bridges between inner and outer liner, allowing the lengths to be cut on site – useful for difficult installations. Hevac also supplied a DWKL CHP flue.

Commenting on the successful delivery of the project, Karl said, “Throughout this project, Hevac has worked closely with Kerrigan Mechanical’s on site team. We are delighted to have contributed to the successful completion of this prestigious apartment projects.”

T: +353 (0)1 4191919


Cheevers Court and Haliday House NZEB complex is a great example of how Daikin air-to-water heat pumps can be integrated into district energy systems…

For this project Daikin selected 3 No. Altherma 3 Hydro Split heat pumps for each plant room.
Working closely with Richard McElligot, McElligot Consulting Engineers, Daikin designed a system that used the power produced on site by the CPH’s to run the heat pumps. The heat pumps transfer heat to a larger buffer tank, which is used as the primary energy in the district energy system – ensuring minimum energy usage and very low carbon emissions – with the boilers used only for peak demand.

Once the Daikin Altherma 3 heat pumps were installed and commissioned, the Daikin team worked closely with Kaizen Energy to fine tune the system and configure the units for optimum output and energy usage.

Commenting on the completed project, April McHale, Technical Sales Engineer said, “As a valued Daikin partner, we have worked together with Kerrigan Mechanical on numerous residential heating projects for major developers on the east coast. We were delighted to engage on this project to provide a system that would contribute to low carbon output and the use of renewable energy produced on site.”

T: +353 (0)1 642 3430


Renewable energy system suppliers Glenergy provided Micro CHP units for the nZEB district heating system at Cheevers Court and Halliday House…

“Using CHP technology in conjunction with heat pumps and gas boilers is a fantastic combination in group heating schemes,” said Glenergy Director, Jonathan Leonard, “but requires careful design to make sure each technology is sized correctly and complies with NZEB requirements.

It is also imperative to ensure each system fits in, so it optimises its contribution to keep running costs low for the operator and the occupants of the building. “We worked closely with the design team in McElligots and Kerrigans to make sure our CHP units worked with the heat pumps and boilers for all the design and operational requirements of the project.”

Glenergy is based in Kilcoole, Co. Wicklow and provides renewable energy systems for domestic and commercial applications. Established in 2015 as an amalgamation of three companies in the energy business, the company focuses on delivering high quality CHP, heat pumps and solar PV/thermal systems.

T: +353 (0)1 556 3100

Sygma Automation

Sygma Automation provided a building management system that controls the district heating system for the Cheevers Court and Haliday House apartment blocks…

Combined heat and power plant (CHP), heat pumps and boilers are controlled and enabled in sequence to provide residents of Cheevers Court and Haliday House with an effective and energy-efficient heating system. The building operator can log in to the building management systems web server to view and control the mechanical plant. The motor control centre has a local display which also displays the graphics from the web server.

“We used a Siemens BACnet controller in conjunction with a Siemens Desigo Control Point,” explained Sygma Automation MD, Tim Jones. “This facilitates operation and monitoring by allowing access to the plant via the local touch panel, any PC or mobile device – wherever you are located.

“Desigo Control Point is a consistent concept designed to simplify operation and monitoring of heating, ventilation, air conditioning, lighting and shading in small or medium-sized buildings.”
Sygma Automation is one of Ireland’s premier Building Energy Management Systems companies, operating across the whole of the island of Ireland.

T: +353 (0)21 430 8824

SR Ventilation

SR Ventilation supplied and installed a turnkey passive ventilation system to the Cheevers Court and Halliday House nZEB project…

With over 30 years of experience, SR Ventilation is Ireland’s premier HVAC contractor. Working nationwide, the firm supply, install and repair all ventilation and air conditioning systems.

SR Ventilation’s services are available 24/7 in order to ensure that all projects run smoothly and efficiently. It prides itself on delivering excellent customer service and a full turnkey package. Whatever you need SR Ventilation will supply it.

All work is done in-house. Dedicated to quality it only uses the very best materials and products available. The experienced team of dedicated, highly trained sheet metal workers and ventilation installers are knowledgeable, flexible and forward-thinking. The firm is committed to staying up-to-date on all industry changes and the very latest techniques to provide customers with the very best service and end products.

SR Ventilation Ltd is one of only a few sheet metal and ventilation contractors in Ireland to have been awarded FIRAS certification for the installation of fire protection products/systems. All work carried out is fully-certified and, where applicable, products come with CE certs.

T: +353 (0)87 950 0079