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Last Updated on November 21, 2023

Navien LCB700 Blue Flame Oil Boiler Review

The Navien LCB700 Blue Flame Oil Boiler uses oil to provides high rates of hot water and heating for domestic applications. If you are considering the Navien LCB700 for your next oil boiler, we have prepared this guide to share all our technical insights on this model.

Technical Specification:

Manufacturer Navien
Model LCB700 Blue flame
Condensing Yes
Efficiency Rating 93%
Energy Efficiency Class A Rated 
LPG Compatible No
Warranty 10-year warranty
Central Heating Max. Output 21, 28 or 36 kW
Mounting Floor standing
Weight 58 – 62 kgs
Dimensions 860 mm (Height) x 600mm (Width) x 470 mm (Depth)

Key Features:

  • Blue flame technology for maximum efficiency
  • Suitable for all home sizes, floor standing so needs room to be installed with equivalent space to a standard-sized kitchen appliance (washing machine, dishwasher, etc.)
  • Comes with a 10-year warranty
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The Navien LCB700 Blue Flame Oil is an energy-efficient and reliable oil boiler, that offers a range of innovative and technologically advanced features. Navien’s revolutionary blue flame technology gives superior efficiency and guarantees low NOx emissions.

Provides reliable hot water as and when you need it and can maintain hot water pressure when hot water is being used from multiple locations in your home simultaneously.

Despite its large size, this model is relatively low weight and easy to install considering its performance capabilities.

  • Includes a ‘text-driven’ control panel to manage hot water temperature, heating and address system errors
  • Stainless steel and brass construction, rather than more easily corroding copper.
  • Comes ready to integrate with the latest smart technology
  • Easy to install and repair
  • Energy efficient with an ErP ‘A’ rating
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Our thoughts:

The Navien LCB700 Blue Flame Oil is a low polluting and high performance optimised boiler featuring an extensive range of exceptional design and engineering features.

This range comes in three sizes which will suit any household or business. This style of boiler can generally provide adequate hot water for most average-sized family homes.

Innovative technology

The features of the LCB700 are quite extensive. Highlights include the control panel which enables users to set up three areas of their home as ‘zones’ and control each one individually.

You can also integrate with Navien’s Smart Plus smart thermostat app. And that’s not where the smart integration ends. The LCB700 boilers can connect to the internet and monitor the weather via the OpenWeatherMap. It will use the data to maintain a comfortable temperature, within the levels, you pre-set so that the boiler only consumes oil when essential.

Engineering excellence

Stainless steel heat exchanger prevents corrosion and erosion and ensures an extended lifespan, as well as robust performance compared to copper equivalents.

Because of the built-in Smart Auto Mixing and Smart Auto Flow Control Valve, the LCB700 delivers consistent flow temperatures across multiple outlets.

Classic yet modern design

In classic, stylish monochrome and with an easy-to-use text-driven smart control panel at the front of the unit, Navien has a model that is very much in keeping with most modern kitchen and utility room appliances. You can even keep an eye on fuel consumption.

Manufactured in South Korea

The Navien brand is relatively new to the UK market, but they have been making high-quality boilers for over forty years. Their industry-leading boiler manufacturing facility just outside of the South Korean capital Seoul, is the largest boiler manufacturing plant in the world. South Korea has a reputation for innovative technology and that is demonstrated across the Navien brand.

Boilers and parts are well-stocked across the UK and can be obtained from retailers including Plumbase and Screwfix.

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