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Navien Boilers


Navien is one of the largest boiler brands in the world. They're relatively new
to the UK market, but due to their high-performance heating products,
they’re already considered one of the best oil brands available.

Choose Boilerhut for professional, nationwide Navien boiler installations.
Ensure the performance of your heating system with our boiler installation,
repair and replacement services.


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Navien Boilers

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Why Choose Navien Combi Boilers?

Navien UK has been offering reliability and A+ energy-efficiency ratings to UK homeowners since 2014. Their gas and oil combi boilers have been growing in popularity since 2017, thanks to their reputation for high performance and the use of smart crossover heating technology.

Navien was founded in South Korea in 1978 as KyungDong Navien, and currently produces condensing combi boilers and tankless water heaters for houses across North America, South Korea and other global regions.

Today, Navien offers its range of boilers and water heaters to more than 30 countries worldwide. They have been ranked first in the Gas Boiler category of the Korean Standard Quality Excellence Index every year since 2006.

To uphold its excellent reputation, Navien manufactures all the components used in its boilers. This is done at their four production facilities in Seotan, Pyeongtaek, Yeongdeungpo-gu and Geumcheon-gu districts of Seoul. The Seotan factory holds the honour of being the world’s largest boiler manufacturing facility.

Enjoy peace of mind with Boilerhut; our installation process is designed to be easy and efficient. Trust our professional boiler installers to handle all jobs with great care, from start to finish.

Our Navien Boiler Range

Navien offers a comprehensive range of combi boilers, storage combi boilers, system boilers and conventional boilers for domestic use. Their range is available in oil and gas options. While combi boilers heat water on demand, system and conventional boilers typically work with a hot water storage cylinder to supply hot water throughout the home.

Navien LCB700 Oil Combi Boiler | Boilerhut

Navien LCB700 Blue Flame Oil Boiler

  • Size: 21kW, 28kW & 36kW
  • Efficiency: 93%
  • Warranty: 10 Years
Read our in-depth review
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Navien Condensing NCB Gas Combi Boiler

Navien Condensing NCB Gas Combi Boiler

  • Size: 24kW, 28kW, 34kW, 40kW
  • Efficiency: 92%
  • Warranty: 7 Years
Read our in-depth review
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Navien Oil Combi Boilers

Oil combi boilers are highly efficient and don’t require tanks like a system or conventional boiler. They offer two innovative features: stainless steel heat exchangers and high-temperature blue flame technology.

Navien’s oil combi boiler range includes 3 power outputs: 21kW, 28kW, and 36kW, available in either internal or external versions. This gives you amazing flexibility as outside boilers don’t take up internal space, while inside boilers offer compact dimensions that are easier to reach. Navien makes it easy to find the ideal oil combi boiler for your home and heating needs.

All their units come with a 93% efficiency rating and a 10-year warranty when installed by an approved installer, such as Boilerhut.

The Benefits of Navien Oil Boilers

Navien is a well-known company worldwide, and when it comes to oil, it is our brand of choice. Here are a few benefits Navien oil boilers offer:

  • Stainless steel heat exchangers: More efficient than aluminium heat exchangers due to their higher heat resistance.
  • Blue Flame technology: Oil is burned at a higher temperature than standard yellow flame, improving efficiency and lessening waste. Compatible with bio-oils.
  • Quick response times: The Navien team responds quickly to homeowners to investigate and fix problems.
  • 10-year warranty: All their boilers are designed for easy installation and are backed by a secure 10-year warranty.

Oil boiler costs | Boilerhut

Navien Boiler and Central Heating Price Ranges

Costs can vary due to the complexity of the pipework that runs from the boiler to the home, especially with external boilers. Although the upfront costs can be intimidating, our Boilerhut team works to find a suitable boiler match for all our clients. The following prices are the average costs for the boiler. Please note that these prices can fluctuate and do not include installation costs.

Navien manufactures several easy-to-install boilers, such as the Navien LCB700 internal oil boiler. Installation costs will vary from £1,000 to £1,700, depending on factors such as the number of taps, kitchens and bathrooms that require hot water. This means you will pay anything from £2,798 to £5,016+ for a new oil boiler.

Get a Hot Water Boiler Quote

If you are one of the almost 5 million people with an oil tank and need a new boiler, get a free quote today. Our virtual quotes can be conducted in only 60 seconds. We’ll provide a comparison between a few models and give you a great price.

The price includes everything —filters, installation, building regulations sign-off, and warranty documentation—ensuring your home stays warm and comfortable. You can read more about Grant oil boilers and the Worcester Heatslave II oil boiler, too.

FAQs about Navien boilers in the UK

Navien boilers are known for their reliability and high-performance engineering. The company manufactures many of its components in-house, enabling strict quality control across its product range. Navien oil boilers also feature stainless steel heat exchangers, which are designed for long-term durability and consistent performance.

When installed by a qualified professional, Navien boilers can provide efficient heating and hot water for many years.

It depends on the type of Navien boiler installed.

Navien combi boilers heat water on demand, meaning they do not require a hot water storage cylinder. This makes them ideal for smaller homes with limited space.

Navien system and conventional boilers, however, typically work alongside a hot water storage cylinder to supply multiple taps, showers and bathrooms with hot water simultaneously.

Navien boilers are designed with efficiency in mind. Many of their oil combi boilers achieve efficiency levels of around 93%, which helps reduce fuel consumption and lower heating bills.

Features such as stainless steel heat exchangers and blue flame technology help maximise heat output while minimising wasted energy.

Why Choose Boilerhut to Be Your Installer?

The engineering team at Boilerhut has been trained to install all Navien Boiler models, including their combi, system and regular boilers. We help you choose a Navien boiler suited to your needs. Boilerhut offers:

  • Quick oil boiler installation.
  • Instant, no-obligation quote in less than 1 minute.
  • Oil boiler finance options for new boilers and central heating.
  • 10 to 12-year warranty on Navien boilers.
  • ‘Excellent’ 5* customer satisfaction on Trustpilot.
  • We operate on fixed prices. No hidden extras.
  • Get up to three quotes for different-tier boilers.

Choose us to install your new Navien boiler and experience excellent service throughout your entire warranty. Ease winter worries with Boilerhut, a smarter way to keep your home warm and comfortable.

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