Navien LCB700 36kW External Oil System Boiler | Boilerhut

Navien LCB700 36kW External Oil System Boiler

Price: £2,891    each, inc. VAT | Ex. installation | 3-10 years finance available.

If you are in search of a reliable and efficient heating system for your home, the Navien LCB700 36kW oil system boiler is definitely worth considering.

This boiler is designed to provide you with a high level of hot water and heating, ensuring your home is warm and comfortable even on the coldest days. The Navien LCB700 is built to last and features stainless steel heat exchangers, which not only improve durability but also help to reduce maintenance costs.

Another great feature of this boiler is the Blue Flame technology, which is unique to Navien and provides even heat distribution and increased energy efficiency. In case you need more information about the technical specifications of the Navien LCB700, we have included a quick review below to help you make an informed decision.

  • Heat output: 21kW
  • Stainless Steel Heat Exchanger
  • 10 Year Warranty

(Boiler-only price: comparing five or more suppliers, including Screwfix and Plumbase. Correct February 2024).

The Navien LCB700 36kW Oil System Boiler is a modern condensing boiler with a high efficiency of 93%. It offers a range of innovative and technologically advanced features. For example, Blue Flame technology gives superior efficiency and guarantees low NOx emissions.

Navien LBC700 Stainless Steel Heat Exchanger

Navien LBC700 36kW Stainless Steel Heat Exchanger.


  • 93% / A rated efficiency
  • Stainless steel heat exchanger, making it highly efficient and durable
  • Hydrated Vegetable Oil (HVO) compatible
  • Get a premium oil system boiler at a great price.
  • 10-year warranty
  • Modulation rage of 1:10
  • Also available in an internal version and available in 28kW and 36kW system boiler versions

Size and Installation

  • External version of the LCB700; heavily insulated and protected
  • 36kW oil condensing system boiler
  • Integrated expansion vessel


  • Easy to use controls
  • 3-zone ready – control up to 3-zones out-of-the-box
  • Smart thermostat compatible such as Tado and controlled via a smartphone

Environmentally Friendly

  • Blue Flame technology burns fuel at a higher temperature, resulting in fewer emissions
  • Low NOx emissions for reduced environmental impact
  • 1:10 modulation enables running at reduced power output
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