Navien LCB700 28kW Internal Oil Combi Boiler | Boilerhut

Navien LCB700 28kW Internal Oil Combi Boiler

Price: £2,914    each, inc. VAT | Ex. installation | Oil boiler finance available.

The Navien LCB700 28kW oil combi boiler uses oil to provide high rates of hot water and heating for homes. These boilers are robust and have stainless steel heat exchangers – something we love. They’re also one of the only boiler models using Blue Flame technology.

If you are considering the Navien LCB700 for your next oil combi boiler, below is a quick review and technical specification to help you get as much information as possible.

  • 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 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
  • Premium oil combi boiler for a great price
  • 10-year warranty
  • Modulation rage of 1:10
  • Also available in an external version and available in 21kW and 36kW combi boiler versions

Size and Installation

  • 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 to ensure less emissions
  • Low NOx emissions for reduced environmental impact
  • 1:10 modulation enables running at reduced power output
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