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 the best boilers and solutions to meet the changing domestic and commercial heating needs. From launching Asia’s first condensing gas boiler to launching the wall-hung Gas Boiler, we have continually designed the best and most reliable products with our customers in mind.

Today, Navien is the fourth largest gas boiler manufacturer in the world, placing us at the forefront of domestic and commercial heating markets.

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 Combi Crossover category – the first combi boiler capable of delivering hot water to three showers simultaneously for consistent comfort.

We’re also working towards the future. Whilst UK trials on hydrogen boilers have been postponed, we are moving forward with other sustainable heating solutions with the launch of the first Navien air-source heat pump.

With water heaters, smart controls, and our latest Smart Plus ON AI controller, Navien UK provides the best selection of heating products for homeowners and businesses.

Manufacturing & Company Philosophy

We have been designing and manufacturing reliable and easy-to-install boilers for over 45 years. From the latest gas and oil-fired technology to micro-CHP and solar, we are committed to developing highly efficient heating equipment.

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 the latest technology to all our boilers.

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. Inside, our NaviCircTM valve 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.

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.

Quality first

We design and manufacture our boiler components to deliver maximum reliability and performance.

Fully tested

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 – this ensures all our boilers are of the highest standard.

A global company

KD Navien, the world’s leader in green 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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Founded as Kyung Dong Machinery Co., Ltd.
Founded Kyungdong Machinery Co. Ltd
Launched Asia’s first condensing gas boiler

Launched Asia’s first condensing gas boiler

Launched wall hung gas boiler

Launched wall-hung instantaneous gas boilers and first stainless wall-hung FF storage tank type gas boilers

First IPO in boiler industry

First IPO in boiler industry

Acquired ISO 9001

Acquired ISO 9001

Enters UK market as Navien Ltd, an arm of KD Navien, with offices in Chertsey

Enters UK market as Navien Ltd, an arm of KD Navien, with offices in Chertsey

The first NCB boilers arrives in the UK
NCB-CE Combi Boiler

The first NCB boilers arrives in the UK

Navien Ltd launches ground breaking Blue Flame Oil Boiler
Navien LCB700 regular internal boiler

Navien Ltd launches the ground breaking LCB700 Blue Flame Oil Boiler, featuring an A+ energy efficiency rating, incredibly low weight and the latest burner technology for reduced emissions.

LCB700 shortlisted for H&V News Awards
H&V News Awards 2021 Finalist logo

The LCB700 Bue Flame Oil Boiler is shortlisted in the leading H&V News Awards as HVAC Product of the Year.

Navien Limited Launches the NCB700 Combi Crossover
NCB700 ON Gas Condensing boiler

The first combi boiler capable of delivering hot water to three bathrooms simultaneously.


Our awards

NCB700 ESA Award Winner 2022

Customer Service