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Navien LCB700 Blue flame Oil boiler

Oil Regular/System and Combi Boilers

  • Blue flame is set to replace yellow flame in oil boilers. Navien’s revolutionary blue flame technology guarantees superior efficiency and ultra-low NOx emissions.
  • Weighing only 67kg, the Navien LCB700 is lightweight, easy to handle and optimized for a simple, fast and cost-effective installation.
  • Class-leading flue lengths of up to 20 meters and an IPX5 rating mean that the Navien LCB700 can be installed almost anywhere in your property, with total siting flexibility.
  • The full text driven control panel gives you total control of heating and hot water temperatures. The display will even inform your Navien service engineer about how efficiently the unit is preforming.
  • The traditional stainless steel and brass construction means built-in reliability combined with the high efficiency for which Navien are famous.
  • The Navien LCB700 provides up to ERP A+ when used in conjunction with our Smart Plus control pack.
  • The Navien LCB700 also comes “opentherm” ready, meaning it allows instant access to the latest control technology with minimum disruption and reduced installation costs.
  • The Navien LCB700 Combi offers a built-in Intelligent Mode. This self-learning mode monitors DHW (Domestic how water) usage and prepares it according to the end-user’s typical usage routine. The unit continues to monitor and adjust as necessary.

Features & Benefits

  • SEDBUK A rated Blue flame, low NOx technology and low pollutant emissions.
  • Stainless steel heat exchanger prevents corrosion and erosion and ensures an extended lifespan.
  • High/Low oil pump system allows continuous optimization of heat/DHW output.
  • Uses same plastic flue as NCB gas boiler, with extended venting possible up to 20M, allowing flexible installation options
  • Quick DHW supply function eliminates inconvenient and lengthy wait times.
  • Smart control panel fitted in both internal and external models grants end-user easy and extensive control of LCB700 features.
  • Self-diagnosis and error feedback provided by the full text driven display offers quick trouble shooting instructions.
  • Built-in smart control panel shows end-user how much fuel has been used. So no more checking the oil tank on cold winter days.


Modern and eye-catching design

  • Presented in smart and simple casings, both interior and exterior models offer an extensive range of pioneering design features
  • Modern full text driven control panel adds aesthetic appeal and is easy to use.
  • The full text display makes it easy to see useful information on LPM, supply/return water temperatures, etc.


Full control of your heating with Smart Plus controllers (supplied as an option)

  • Regulates heating according to changes in outside temperature provided by online weather forecasts.
  • Geo-fencing via the Smart Plus App lets your location automatically take care of your heating.
  • Enables the boiler to run in condensing mode operating at its maximum efficiency.
  • Monitor your oil consumption via the controller and never need worry about running out of fuel again.


LCB700 Blue Flame Oil boiler

Helping 13th century property reduce running costs

When the owner of a Grade II listed home in Wadhurst, Kent, needed a replacement oil boiler for an ageing and inefficient system, he turned to Navien and the new, highly efficient LCB700 range.
Read the full reference…

LCB700 Installation and Operation Manual
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Navien LCB700 Product Brochure
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Why buy Navien?

  • Only the finest stainless steel components used to ensure unbeatable build quality and long lasting reliability
  • SEDBUK A rated boasting the highest efficiencies for your heating and hot water requirements
  • Intuitive easy to use controls help you to minimise running costs and get the best from your heating solution
  • Built in system offering unprecedented flueing flexibility, enabling the boiler to be fitted virtually anywhere in the home
  • Industry leading condensing technology to maximise performance and minimise emissions
  • Exceptional customer and service support available – help from our trained experts is just a phone call away