Green HaaS



We have a passion and commitment for reducing carbon emissions for the planet and using disruptive business technologies to enable positive change for businesses. At Green HaaS, we are committed to bringing our business and energy expertise to you and working together to make your business more efficient and reduce your carbon footprint.


Co-Founder and Chief Executive Officer

Founder and owner of CES Energy in Ireland, Cogent Energy in Australia, ESDM in Saudi Arabia. He has a passion for acceleration of energy efficiency and carbon reduction technologies and solutions into business. As an engineer, he is very focused on delivering the optimum technical and commercial solutions for customers. Tom has acted as energy adviser at board level for some major international companies. He is a former E&Y Entrepreneur of the Year Finalist and believes innovation in business service solutions has a key role in the decarbonisation journey”

As the old Greek phase goes “Society grows great when old men plant trees whose shade they know they will never sit under”… let’s business leaders start planting those trees by taking a longer perspective on our decision!

Pat Nolan

Co-Founder and General Manager

With nearly 10 years experience in the energy sector with strong project development and project financing focus, Pat was previously Commercial Manager with Centrica Business Solutions Ireland and with CES Energy before that. 

Pat has developed and delivered a 5MW solar PV project for Dale Farm, Northern Ireland, commissioned in 2018 and was responsible for all phases including planning, grid connection, land leases & wayleaves, design, EPC & O&M contract, client PPA, be-spoke grid sharing agreement, export PPA, securing of project equity & debt financing.
Pat also delivered financial close on a 8MW thermal & 1.2MW electrical biomass ORC/CHP project in Ireland, commissioned in 2019, responsible for the preparation of key contracts and management of stakeholders through the due diligence process to secure equity & debt financing.

David Connolly

Chief Technology Officer

With 14 years experience in the energy sector across research, teaching and industry, David has had previous roles including CEO and Head of Policy at Wind Energy Ireland and Associate Professor at Aalborg University, Denmark.


David has Co-founded multiple trade associations in Ireland including Renewable Energy Ireland, the Irish District Energy Association and Energy Storage Ireland. He Led the research which underpinned the Irish government setting a 70% renewable electricity target for 2030 and is a contributor and spokesperson on the climate change agenda, featuring on programmes such as Prime Time, EcoEye, Ear to the Ground, RTÉ News, Morning Ireland, Drivetime, and Newstalk. Outside of Ireland, David is a respected  international expert on Renewable Energy having delivered over 50 presentations around the world and to key stakeholders in Dáil Éireann, the Scottish Government, the European Parliament and the European Commission.


We gather your information, spec our GreenHaaS system to suit your needs, and issue proposal/contract

We supply and install our GreenHaaS system, with zero capex from you and no disruption to your business

We meter the green heat we supply to your business and invoice you monthly, no different than any other utility bill

We will continually manage, maintain and optimise our System to maximise the efficiency and carbon savings

We will give you constant visibility on your carbon and energy savings

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