Navien LCB700 28kW Internal Oil System Boiler | Boilerhut

Navien LCB700 28kW Internal Oil System Boiler

Price: £2,337    each, inc. VAT | Ex. installation | 3-10 years finance available.

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

If you’re considering the Navien LCB700 28kW for your next oil system boiler, here’s a quick review and technical specifications to help you gather 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 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
  • Premium oil system 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 system boiler versions

Size and Installation

  • 28kW oil condensing system boiler
  • Integrated expansion vessel
  • Easy to install


  • 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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