Navien LCB700 28kW External Oil Combi Boiler | Boilerhut

Navien LCB700 28kW External Oil Combi Boiler

Price: £3,255    each, inc. VAT | Ex. installation | Oil boiler finance available.

If you’re looking for a high-performance oil combi boiler that provides both hot water and heating, then the Navien LCB700 28kW model is an excellent choice. These boilers are built to last and feature stainless steel heat exchangers, which are highly durable.

Moreover, they are one of the few models that use Blue Flame technology, making them more efficient and eco-friendly. To help you make an informed decision, we have provided a quick review and technical specifications below.

  • 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 Combi Boiler is a state-of-the-art condensing boiler that boasts an impressive 93% efficiency rating. This boiler comes equipped with several advanced features, such as Blue Flame technology, which provides superior efficiency and ensures low NOx emissions.

With its cutting-edge technology, the Navien LCB700 28kW oil combi boiler is an excellent choice for those seeking an efficient and environmentally-friendly heating solution.

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 combi boiler at a great price.
  • 10-year warranty
  • Modulation rage of 1:10
  • Also available in an internal version and available in 21kW and 36kW combi boiler versions

Size and Installation

  • External version of the LCB700; heavily insulated and protected
  • 28kW oil condensing combi 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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