A conversation with Stephen Grant

Stephen Grant, founded the company over 45 years ago and here he explains how Grant has developed over the years and stayed ahead of the game in terms of innovation and the development of heating products which are providing comfort in homes all over the world.

Where did your career start? 

“I started my career installing heating and plumbing systems and was passionate about creating heating technologies that would stand out from the rest as a market leader. I developed my first back boiler in 1977 which evolved into the Triplepass back boiler in 1980, which at the time was by far the most efficient on the market.” 

What is Grant’s unique selling point? 

“During those early years, we always focused on ensuring that anything we produced was better than anything else on the market and this has been important to us ever since. It is this frame of mind instilled in our team that has driven the success of Grant in Ireland and further afield. After every boiler I created I would think about how I could improve it and achieve a higher efficiency system.” 

Tell us about the award-winning Grant Vortex range 

“In 2002, after a lot of research, I created the Vortex condensing oil boiler, which at the time was years ahead of anything else on the market as it was up to 97% efficient. As all other heating technologies in the early 2000s were around 75% efficient, the Vortex range very quickly became the market leader and evolved into an award-winning heating technology that rivalled no other. Advancing our popular condensing range was the obvious next step and around 2010 and this is when I developed the Spira wood pellet boiler. It too ran at a high efficiency of 95%, about 10% better than any other wood pellet boiler available at that time.” 

How have you seen heating technologies advance over the years? 

“In recent years there has been a huge emphasis on the future of heating and the need for more sustainable, renewable technologies and our team has made this a priority in terms of research and development.  

 Our innovative heat pump range began its development in the early 2000s, but in 2016 we introduced our third generation of heat pump, the A+++ Aerona³ R32 inverter driven air source heat pump range. The R32 refrigerant has a significantly lower Global Warming Potential (GWP) than other typical refrigerants which makes it compliant with upcoming legislative targets.  

As our heating technologies have advanced over the years it has become increasingly important for us to ensure our products, including the main heat source, heat emitters like the Uflex underfloor heating system and Afinia radiator range and complementary technologies, including our domestic pre-plumbed hot water cylinders, work together to achieve the best possibly efficiency rating and meet all relevant requirements as set out by building regulations.” 

What’s next for Grant’s innovative heating technologies? 

“With over 45 years’ experience in the heating industry, our team has developed an enviable portfolio of innovative heating products and we are extremely excited to advance our offering even further.” 


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Think Heating. Think Grant.