Pioneers for life

Although our company’s been making products for the home since 1939, things really got moving 50 years later. By then we were a dedicated group of Dutch engineers and researchers who were making high-efficiency condensing boilers.

Believe it or not it would be another 17 years before condensing boilers would become mandatory in the UK, but we’ve always been pioneers at heart. In 1996 we designed a boiler component that was so simple and advanced, it remains at the cutting edge of boiler technology today. It’s our bithermic heat exchanger. What this means is that our boilers have no secondary hot water plate heat exchanger, diverter valve (combis), valve motor or auto air vent; basically, all the parts that stick, leak and let you down aren’t there. And, unlike other condensing combis, ours condense all the time in both central heating and hot water modes, delivering exceptional energy efficiency.

Today we’re still a close-knit group of engineers and researchers and we’re just as dedicated, but there are a lot more of us and we’re multi-national. In 2008 we were delighted to open our UK head office and distribution warehouse in the Midlands and we work together to develop heating and hot water solutions that reduce emissions, keep energy bills low and protect our planet.

Case studies

You’ll be surprised how many problems our boilers and accessories can overcome.


In 2019 we became part of American manufacturer, Rheem Global.

Climate crisis

What on Earth are we doing? Here’s where we’re at.

The word is out...

These boilers are amazing. Take the HRE 36/40, you can run two baths at the same time*, because it has the power to do that, and you don’t need to lose cupboard space to a cylinder; you’re only heating the water you need, which is highly energy efficient and just what Tamara wanted.

Steve Collins, Managing Director of Valleytech Heating

The word is out...

It may have taken six years to achieve what I wanted, but I wouldn’t settle. I didn’t want to go electric, it’s too expensive and I definitely wanted a combi so I could have instant hot water. With a double height living room, cost-effective heating is vital. I wanted affordable comfort and now I’ve got it.

Tamara Jones, New Lanark (UNESCO World Heritage Site)

The word is out...

From its OpenTherm compatibility and modulation rate to the bithermic heat exchanger, Intergas boilers have been designed with energy efficiency at its heart. For example, when an Intergas boiler is used as a combi, it can condense virtually all the time it is producing domestic hot water which is unique within this industry.

Ross McKenzie, Managing Director of Ross McKenzie Ltd Plumbing & Heating

The word is out...

The Eco RFs are ultra-reliable and, since 2019, there have only been two boiler issues and both were to do with low pressure. In each case they were easily resolved by calling the customers and asking them to top up their boilers.

Paul Stephens, Development Project Manager, United Welsh

The word is out...

Intergas boilers are unique in their ability to receive pre-heated hot water and, by using an Intergas clip on the pipe temperature sensor, the boiler will only fire up if the water temperature is below 50°C and will only top up what is needed. This is a great way to save energy, save money and lower carbon emissions.

Danny Martin, Heating Engineer, Aqua Plumbing & Heating Ltd

The word is out...

It’s important that we give our tenants the peace of mind that comes with a reliable boiler, one that’s extremely economical to run, and Intergas has delivered just that.

Ailsa Sadowski, Property Services Officer at Ochil View

The word is out...

I installed two Intergas Eco RFs, one for heat only and one for heat and hot water. Not only do they supply the economy and efficiency required by Peartree Short Break Centre, they are simple to operate and have built-in features that will enable me to check on boiler operation remotely using my smartphone or tablet.

Dan Robinson, Managing Director, Jennings Heating