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Navien Boilers

Navien is one of the biggest boiler brands in the world. They're new to
the UK but we think they're one of the best oil brands available. Read
our reviews, Navien history and pricing.


Save up to £500 PER YEAR a year

Navien Boilers

You may not have heard of Navien, but that’s ok. They’re new(ish) in the UK but are pretty much the world’s biggest boiler brand.

For our engineers, Navien is the best choice for oil boilers for two reasons: stainless steel heat exchangers and high-temperature blue flame technology.

Keep reading to find out all about Navien and why we recommend and install them nationwide.

A Quick History of the Navien Boiler

Operating in the UK since 2014 and offering oil combi boilers since 2017, Navien is a relatively new entrant to the UK boiler market. Navien was founded in South Korea in 1978 as KyungDong Navien (KD Navien) and is the world’s best-selling boiler brand.

Today, Navien is the number one brand for condensing combi boilers and tankless water heaters across North America. A position which the company has held for well over a decade.

Navien is the number one boiler manufacturer in South Korea. And they have been ranked first in the Gas Boiler category of the Korean Standard Quality Excellence Index every year since 2006. Navien offers its range of boilers and water heaters to more than 30 countries worldwide, including the UK.

All the boilers available from Navien and all the components utilised within them are manufactured by Navien. This is done at its four production facilities in Seotan, Pyeongtaek and the  Yeongdeungpo-gu and Geumcheon-gu districts of Seoul. The Seotan factory holds the honour of being the largest boiler manufacturing facility in the world.

Our Navien Boiler Range

Navien offers a comprehensive range of combi boilers, storage combi boilers, system boilers and conventional boilers for domestic use. Navien’s domestic boiler range is available in gas and oil fuel types.

Navien LCB700 Oil Combi Boiler | Boilerhut

Navien LCB700 Blue Flame Oil Boiler

  • Size: 21kW, 28kW & 36kW
  • Efficiency: 93%
  • Warranty: 10 Years

Navien Condensing NCB Gas Combi Boiler

  • Size: 24kW, 28kW, 34kW, 40kW
  • Efficiency: 92%
  • Warranty: 7 Years
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Navien Oil Combi Boilers

Oil combi boilers, like their gas equivalents, are highly efficient and don’t require tanks like system or conventional boilers.

Navien’s oil combi boiler range includes 3 power outputs (21kW, 28kW and 36kW) and either an internal or external version. This gives you amazing flexibility as you can put their boilers outside and save room inside your home.

All their coil combi boilers come in a 93% efficiency, which is more than pretty much any Worcester or Grant oil boiler. They also come with a 10-year warranty when installed by an approved installer (like Boilerhut).

Our Navien Boiler Review

Navien is a very well-renowned company with years of history worldwide. But they’ve only been in the UK briefly, and they’re not as big as other brands.

If you’ve read any of our other reviews, you’ll know we like stainless steel heat exchangers. They’re a lot better than aluminium ones. We recommend Viessmann as our go-to gas and LPG boiler brand because of this.

But when it comes to oil, Navien is our brand of choice.

They’re not only known for stainless steel heat exchangers, but they;re one of the only oil boilers with Blue Flame technology. Blue Flame means that oil is heated and burned at a much higher temperature than standard yellow flame. This burns fuel more efficiently, and there is less waste. It also means that the Blue Flame boilers will be compatible with bio-oils.

We install Navien boilers nationwide, and we hardly ever hear of any issues with them. And, if there are any issues that occur, Navien are quick to investigate and fix due to their industry-leading 10-year warranty.

It is worth noting that, like all manufacturers, Navien isn’t perfect. Their Trustpilot score isn’t great at 4.1/5 (correct early January 2024) but this is down to them not collecting customer reviews. This means people tend only to leave bad reviews if there is an issue. This heavily skews the score towards the negative end of the scale.

In summary, we really like Navien boilers. They’re a great product that works really well. We find their support fantastic and warranty industry-leading for oil boilers.

The Benefits of Oil Boilers

Oil boilers have their advantages and disadvantages. For example, you have to buy oil, which can fluctuate in price. But you could buy oil in summer when prices are lowest.

LPG is another option for homes not connected to the gas grid. LPG boilers are less expensive as you can mostly buy a gas boiler and convert them to LPG – Viessmann boilers only need a quick setting change by a heating engineer (no hardware changes). But, LPG is more expensive to buy than oil, in general.

They are the only fuel type that tends to come, as standard, with external versions, which is great for space saving.

One big disadvantage is that a new oil boiler installation will require a new oil tank in the garden. LPG uses bottles which is cheaper in the short-term. Oil tanks can cost anywhere from £500 to £5,000. Oil leaks are rare but can have a devastating effect on local wildlife.

Navien Boiler Price Range

With external boilers especially, costs can vary due to the complexity of pipework runs from the boiler to the home, but it may not be as expensive as you think. The following prices are for the boiler only and do not include installation, they are also averages as oil boiler prices fluctuate.

  • Navien combi boilers range from £2,611 to £3,316.
  • Navien system boilers range from £2,266 to £2,891.
  • Navien regular boilers range from £1,798 to £2,699.

Installation costs will vary from £1,000 to £1,700, depending on many factors. This means you will pay anything from £2,798 to £5,016+ for a new oil boiler installation.

What next?

If you are one of the almost 5 million people with an oil tank and boiler and need a new boiler, get a free quote today. We’ll give you a comparison between a few models and give you a great price.

The price will include everything, including all filters and installation. Sign-off and building regulations. Warranty documentation and a nice warm home!

You can read more about Grant oil boilers and the Worcester Heatslave II oil boiler, too.


Need a new oil boiler?

If you need a new or replacement boiler or are looking at having a central heating system installed, get an online quote (it takes less than 1 minute), and you’ll get an instant price. But why choose Boilerhut:

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

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