Navien LCB700 28kW External Oil System Boiler | Boilerhut

Navien LCB700 28kW External Oil System Boiler

Price: £2,449    each, inc. VAT | Ex. installation | 3-10 years finance available.

If you are looking for a reliable and efficient oil system boiler that can provide hot water and heating for your home, the Navien LCB700 28kW system boiler is an excellent choice.

These boilers are designed to last long and are equipped with stainless steel heat exchangers, which is a great feature. Moreover, they are one of the few boiler models that use Blue Flame technology.

If you are interested in purchasing the Navien LCB700 oil system boiler, you may find the following review and technical specifications useful in making an informed decision.

  • Heat output: 28kW
  • 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 28kW 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 28kW 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
  • 28kW 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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