Mechanical

H A O’Neil is Irelands largest and most experienced Mechanical HVAC and Process Piping Contractor, serving the construction industry for over 125 years.

We provide the following services throughout Ireland, UK, Europe and the Middle East.:

  • HVAC Installation
  • Process Pipework Installation
  • Plant and Tool Hook-Ups
  • Process Plant Erection
  • High Pressure Steam
  • Water Treatment
  • Refrigeration
  • Ventilation
  • Medical Gases
  • Specialist Rigging
  • Commissioning of Building Services
  • Maintenance of Building Services
  • Design
  • High Corrosion Installation
  • Air Conditioning
  • Heating
  • Plumbing
  • Gas Installation

 



Latest News

STEAM Engineering-in-a-Box

We have always recognised the importance of the STEAM subjects – science, technology, engineering, arts and maths. As our CEO Jim Curley put it:

“If...

Supporting Access to Apprenticeship

We are delighted to support the Access to Apprenticeship programme run by Dublin Institute of Technology (DIT).

Recently Tom Jones and Simon Watson put on...

Creative Thinking – Irish Building Magazine talks to Jim Curley

“With a current portfolio of work that includes the National Children’s Hospital, Dublin Airport’s new air traffic control tower and as part of the...