Ireland's Plumbing & Heating Magazine Issue 114 July-August



K errigan Mechanical excelled in delivering an exceptionally energy-efficient and sustainable mechanical services installation for the Premier Inn Gloucester Street South Dublin project, resulting in it attaining a BER A2 rating – the highest possible rating achievable. The scope of works encompassed the installation of plumbing, heating, soils, ventilation and air conditioning systems to the 11-storey, 113-bedroom, city centre hotel. The project presented several challenges. The hotel had a small footprint and was located in close proximity to schools, making logistics and site access challenging. Furthermore, the restricted height of the floors posed coordination difficulties, particularly in view of the extensive pipework required on each floor. As a result, the project necessitated meticulous coordination to accommodate all mechanical and electrical services within the allocated spaces. The impressive BER rating of A2 highlights the exceptional energy efficiency and environmentally friendly design of the mechanical services. This accomplishment was made possible by implementing a combination of heat pumps and gas boilers for the hot water system, as well as utilising Hybrid VRF air conditioning. The installation of Hybrid VRF air conditioning played a vital role in achieving the higher energy rating. Unlike standard VRF systems that rely solely on refrigeration, Hybrid VRF incorporates a blend of refrigeration and water. This approach significantly reduced the need for refrigerant gas and associated leak detection systems. Kerrigan Mechanical installed four heat pumps in a cascade arrangement on the roof, which were supplied by Mitsubishi Electric Ireland. Mitsubishi also provided hybrid VRF Air Conditioning which provided heating and cooling functionality through an interface in each room. Each room was equipped with a bespoke Premier Inn logo and featured local temperature control, which could also be adjusted via the Building Management System (BMS). The hot water system throughout the building, including showers, toilets, kitchen and other facilities, relied on the heat pumps being capable of reaching temperatures up to KERRIGAN MECHANICAL DRIVES ENERGY EFFICIENCY AT PREMIER INN DUBLIN TO ACHIEVE BER A2 RATING… SETTING NEW STANDARDS AT PREMIER INN DUBLIN

“Premier Inn Dublin is testament to Kerrigan Mechanical’s ability to deliver high-quality results within strict constraints.”



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