About Us.
Over 45 years in global innovation
of domestic and commercial heating.
Since 1978, the KD Navien group has been pushing the boundaries of innovation by providing our customers with high quality boilers and solutions to meet the changing domestic and commercial heating needs. From launching Asia’s first condensing gas boiler to introducing wall-hung gas boilers, we have continually developed reliable products with our customers at the heart of our design process.
Today, Navien is the fourth largest gas boiler manufacturer in the world, placing us at the forefront of domestic and commercial heating markets. As a global leader in advanced heating technology, we specialise in high-efficiency and energy-efficient heating solutions.
Navien in the UK
Navien has been in the UK since 2014 and, in that time, has become an established manufacturer of gas boilers for the UK market. Since entering the UK gas boiler market with our NCB-CE gas condensing boiler, we have gone on to introduce the class-leading LCB700 Blue Flame condensing oil boiler, which has become the leading boiler of its type.
In 2022, we launched NBC700 ON – part of the NCB ON Range – the first combi boiler capable of delivering hot water to three showers simultaneously for consistent comfort, without temperature fluctuation.
We’re also working towards the future. The Navien PEM750 heat pump is our future-proof low-carbon heating solution, designed for environmentally conscious homeowners.
With water heaters, high efficiency boilers for both ducted and ductless HVAC systems, smart controls, and our latest Smart Plus ON AI controller, Navien UK delivers fully integrated, energy-efficient heating and comfort solutions for homes and businesses. Our systems are designed to work together seamlessly, giving homeowners and commercial customers complete control, improved efficiency, and reliable performance across every aspect of indoor climate.
Manufacturing & Company Philosophy
We have been designing and manufacturing reliable and easy-to-install boilers for over 45 years. From high-efficiency gas and oil-fired technology to micro-CHP, solar, and now advanced renewable solutions such as the PEM750 heat pump, Navien UK continues to expand its portfolio of energy-efficient and future-proof heating equipment. Our renewable offerings combine ease of installation, intelligent controls, and low environmental impact, supporting the UK’s transition to low-carbon heating and net-zero targets.
Our state-of-the-art facility in South Korea, is the largest single-site heating product manufacturing plant in the world, producing 2 million units per year. We use the latest research and development, along with high-tech manufacturing methods to create unrivalled quality, unbeaten performance, and superb reliability over their lifetime.
Technological innovation
It’s through years of research and development that we can add and integrate the latest technology across our range of boilers and heating systems.
NCB ON – available in our NCB700 ON Combi Crossover and NCB500 ON Combi Crossover boilers – cleverly maximises the recirculation of domestic hot water while reducing water wastage to deliver hot water for up to three showers at once. The NCB700 ON specifically includes our NaviCirc™ valve, which further reduces the time it takes for hot water to reach the pipe, saving energy and water.
On top of this, the ON AI app gives users complete control of their heating system, with the help of artificial intelligence, to keep bills down. It also includes smart diagnosis to monitor boiler health, HEMS for detailed energy usage reports, and FOTA for easy, wireless firmware updates.
Through more research, development and feedback from our customers and installers, we will continue to innovate, bringing the latest and best technology to our heating products.
Sustainability & environmental responsibility
At Navien, innovation goes hand-in-hand with sustainability. Our boilers are designed for maximum energy efficiency, reducing fuel consumption and carbon emissions while meeting the highest environmental standards.
With the launch of the PEM750 heat pump in the UK, we are expanding our portfolio to include advanced renewable technologies, supporting a low-carbon future. We hold multiple industry certifications and ensure our products not only deliver exceptional performance but also support a greener future. By using recyclable materials and low-emission technologies, Navien is committed to creating eco-friendly heating solutions for homes.
Quality First
Before leaving our factory, every boiler undergoes a thorough, two-stage testing procedure. This includes our robotised process that completes 55 checks per second. Every unit is also given a full working test by an operative to complete a further 250 quality checks, ensuring our boilers meet the highest standard of safety, performance and reliability.
A global company
KD Navien, one of the world leaders in green heating technology,
has been exporting HVAC products to more than 30 nations worldwide since 1978.
The market leader in boilers & water heaters in South Korea.
The market leader in condensing tankless gas waters heaters in North America.
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Our awards
Navien has been recognised for its innovation and quality in heating technology.
These awards reflect our focus on energy-efficient, reliable boilers that deliver consistent performance for homeowners and businesses.
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