Keltic Renewables have been operating since 2007 and was incorporated as a limited company by its co-owners  Owen Regan & Diarmuid Jones in 2013.

Owen & Diarmuid have put their 30+ years, experience in the construction industry to excellent use.  They have based the ethos of the company on the pillars of

  • Quality
  • Efficiency
  • Customer Service
  • Technical Advancement
  • Environmental Responsibility.

We at Keltic Renewables pride ourselves in our commitment to bringing our customers the most cost effective, efficient and user friendly solutions on the market.  These principals are followed right through from design stage to installation and after sales service.

The team at Keltic Renewables are trained and employed directly by us. We do not use sub contractors for our heating and plumbing works and can therefore control the quality of our installations with precison and finesse thus providing the high class installation that our customers rightfully expect.

  • Air to Water Heat Pumps

  • Solar thermal (solar thermal tubes and solar thermal panels) 


  • Solar photovoltaic panels (PV)

  • Underfloor Heating
  • Heat Recovery Ventilation systems

  • Demand Control Ventilation Systems


If you are building a new home you might be already aware of your obligations to comply with the various building regulations.

The regulations that have transpired in Ireland come from various engineering best practice protocols from around the world and are evolved from European and worldwide agreements that the majority of countries, including Ireland, have signed up to. These agreements can and will benefit the environment, public health and the economy.

The European targets can be summed up as follows:

Key EU targets for 2020

  • 20% cut in greenhouse gas emissions compared with 1990
  • 20% of total energy consumption from renewable energy
  • 20% increase in energy efficiency

Key EU targets for 2030

  • At least 40% cut in greenhouse gas emissions compared with 1990
  • At least 27% of total energy consumption from renewable energy
  • At least 27% increase in energy efficiency

Long-term goal

By 2050, the EU aims to cut its emissions substantially – by 80-95% compared to 1990 levels as part of the efforts required by developed countries as a group.

Turning Europe into a highly energy efficient and low-carbon economy will also boost the economy, create jobs and strengthen Europe’s competitiveness.

(source: https://ec.europa.eu/clima/citizens/eu_en)

When it comes to energy efficiency there is a document that details the building regulation requirments for new builds. This document is called Technical Guidance Document Part L Conservation of Fuel and Energy – Dwellings (http://www.housing.gov.ie/housing/building-standards/tgd-part-l-conservation-fuel-and-energy/technical-guidance-document-l-6).

Most people with knowledge of same will refer to this document as Part L.

This document provides guidance on what current building regulations are and values that need to be achieved including u-values/insulation levels, air tightness, efficiency requiremnts on heating systems and guidance on what permissable levels are allowed for energy performance (MPEPC) and carbon performance (MPCPC).

The main section for renewables systems states that new buildings must produce:

  • 10 kWh/m2/annum contributing to energy use for domestic hot water heating, space heating or cooling; or
  • 4 kWh/m2/annum of electrical energy; or
  • A combination of these, which would have equivalent effect.

This can be achieved by installing heat pumps, solar PV, solar Thermal systems amongst others.

Keltic Renewables has a wealth of experience in installing these systems as stand alone or combing these systems together to provide a larger renewable energy output to the dwelling.

An independent BER acessor can and will verify that your buildings will give full compliance on Part L requirements. An additional advantage of engaging with this service is that it also gives Keltic Renewables an extremely accurate model of what the heat requirements of the building will be.


“From the time I rang Keltic Renewables about information regarding the Air to Water Heat Pump they couldn’t have been more helpful. I rang Diarmuid and he sent me on information about the system and then arranged a meeting. At the meeting he gave me a quotation for domestic heating and plumbing for my house and gave me a future prediction of running costs for the heating system. He gave me advice and told me how to insulate my house to get the most out of the system. His predictions are within a few euros of what our heating costs have been for the first 12 months in the house. Diarmuid and everyone that I have dealt with from the quotation stage were very professional and prompt. Once Keltic Renewables started work on the heating and plumbing everything was 100% from the quality of the material to the quality of the workmanship. Everything came on time and work was done as scheduled. Anytime during the build when I rang Keltic Renewables they always answered their phones and helped me as best they could. There have been many contractors on the build of the house and Keltic Renewables are the only ones who have rung twice in the last year to see if everything is running ok and I would recommend them to anybody”

Peader, Bunclody, Co. Carlow

“The sales team at Keltic Renewables were very professional & knowledgeable on all of the systems. Our installation went according to plan with no hassles. The system installed completely meets our needs and we are delighted with the running costs compared to other systems out there. Over all Keltic Renewables provided a great system with excellent aftersales service which I think is important. They don’t just grab the money and run. We would highly recommend them”

Michael, Begnalstown, Co. Carlow

“Keltic Renewables came highly recommended by our Builder. We were very impressed by their product knowledge. Everything was explained very well so I could understand the workings of the system. The heating design they offered was perfect for my home & I was never pushed into considering more expensive systems that I didn’t need. This was proof of the professionalism and honesty of the company. We were also impressed by the professionalism of the installation team. They just got on with the job with no hassle. What they said they were going to do they did & to perfection. We now have hot water anytime of the day and our home is comfortably warm. We are 100% satisfied with the efficiency & running cost of our system. I have recommended Keltic Renewables to several of my friends and family. When our system needs a service we are not kept waiting for days or put on the long finger. Keltic Renewables have one of the lads out to us as soon as possible. The customer care and after sales service form your company are second to none. We are so pleased to have gone with Keltic Renewables.”

Anna, The Curragh, Co. Kildare

“We spent a lot of time researching different heating systems and installers.  We chose Keltic Renewables because they were recommended by a friend and have never regretted our choice.  They have lived up to their reputation for reliability and value. Our system was installed quickly and efficiently.  Owen & Diarmuid were very patient and knowledgeable, answering our many questions. Our running costs for our Daikin Heat Pump have been fantastic, even better than promised.  We would definitely recommend Keltic Renewables to anyone starting to build their home.

Michael, Kilcoole, Co. Wicklow

“Diarmuid was very knowledgeable & helpful when designing & pricing our system. The installation was excellent & prompt. We are extremely happy with our ventilation system. Thankfully we haven’t required any follow up but this is a testament to the great work done. We would definitely recommend Keltic Renewables.”

Geraldine, Nenagh, Co. Tipperary

“From our first contact with Keltic Renewables they gave great advice. The installation team led by Owen were very experienced and professional. We are very happy with our system and Diarmuid is always available to take any queries we have. Keltic Renewables provided an excellent service with a very speedy installation. Overall a very satisfactory experience with Keltic Renewables. Thanks Lads !”

Michael, Ballacolla, Co. Laois

“Keltic Renewables sales & design service was absolutely great. Diarmuid arrived with a lot of information and could answer every question put forward. I couldn’t praise the installation team enough. Our system was installed efficiently with no mess. They did a great job & our system meets our needs. After sales follow up is very good. I can ring the boys any time and they answer questions or even call back out if needs be. We have been really pleased with all aspects of our dealings with Keltic Renewables from start to finish. The provide plenty of information and experience.”

Michael, Rosenallis, Co. Laois

“An excellent product enhanced further by the professional design, supply, installation and most importantly the aftercare & support provided by Keltic Renewables.”

Ray, Delganey, Co. Wicklow

“It was a pleasure to work with Diarmuid and Owen on the construction of our dressing rooms, gymnasium and meeting room for Gracefield GAA, Portarlington from start to finish. They have a world of knowledge on their systems. Always answered the phone and returned calls. I would have no hesitation in recommending Keltic Renewables as they provide an excellent product & service.”

Jack, Gracefield GAA Club, Portarlington, Co. Laois

“From the start Keltic Renewables were a pleasure to deal with. The performance of the systems installed exceeded our expectations, especially the low running costs. In year two the average electricity and heating costs were €150 per month. We are delighted with our system. It was an excellent decision to choose Keltic Renewables. Owen was a joy to deal with.”

Roisin, Boherduff, Co. Carlow

“My husband was working on a house when Keltic Renewables were installing the system. Seeing their installation team in action sold him on the system. He was also very impressed by their description of how it worked. When it came to installing our own system the lads were here when they said they would be and worked very efficiently. We find that in the winter the heating system keeps the house nice and toasty. It has saved us a great deal of money and the fact that it runs on electricity means we have only one bill coming into the house. We would definitely recommend Keltic Renewables to anyone starting a build.”

Caroline, Bunclody, Co. Carlow

“We met Keltic Renewables at a trade show. The design service was excellent and the installation was quick, efficient and uneventful. We needed one of the vents moved at our request and this was done straight away by the installation team. Our running costs are great. It’s a no hassle clean heating system and very convenient for my lifestyle. I would definitely recommend Keltic Renewables to my family & friends. Any queries following our installation have been dealt with efficiently. Follow up service calls and timing of same are very flexible. I have had such a positive experience with the Daikin Air to Water heating system that approximately a year later a family member also built their home with the same system installed by Keltic Renewables. Keltic Renewables are an excellent team. They listen to the requirements, give guidance and feedback. They are very friendly and professional. A pleasure to deal with.” 

Ann, Ballacolla, Co. Laois

Unit 3 Portlaoise Enterprise Centre, Portlaoise Co. Laois
(059) 8622017, (085) 8014339

Heat Pumps, Solar Systems, Heat Recovery Ventilation, Underfloor Heating, Plumbing