Navien LCB700 LC/LCX Blue Flame Internal/External Combi Oil Boiler

Navien LCB700 Blue Flame 28kW Internal Combi Oil Boiler – High-Efficiency Heating for Modern Homes

The Navien LCB700 Blue Flame 28kW Internal Combi Oil Boiler is a smart, eco-friendly heating solution ideal for off-grid homes. With cutting-edge Blue Flame technology and an impressive A+ energy rating, it delivers powerful central heating and instant hot water while reducing emissions and energy bills. Compact enough for indoor installation, it offers smart control compatibility, quiet operation, and long-lasting reliability making it a perfect fit for rural or oil-heated properties seeking efficient, future-ready performance.

Benefits of the Navien LCB700 Blue Flame 28kW Internal Combi Oil Boiler

• A+ Energy Efficiency Rating: One of the most energy-efficient oil boilers on the UK market, helping reduce your home energy bills and lower your carbon footprint.

• Powerful Heating & Hot Water: With a 28kW output, this combi boiler delivers reliable central heating and instant hot water, making it perfect for medium to large homes.

• Blue Flame Technology: Offers cleaner, more efficient combustion, producing fewer emissions than traditional oil boilers making it a greener heating option.

• Smart Boiler Controls: Compatible with Navien Smart Plus controls and OpenTherm, allowing remote temperature control and energy monitoring from your smartphone or smart home system.

• Compact Internal Design: Installs neatly indoors, saving outdoor space and protecting your boiler from weather damage ideal for homes without utility rooms or garages.

• Easy Installation & Servicing: Designed with flexible pipework arrangements and a combined PRV/condensate drain, reducing install time and service costs.

• Quiet Operation: Built to run smoothly and quietly, enhancing home comfort without unwanted noise.

• Future-Proof Heating: Designed to meet modern efficiency standards and prepared for upcoming heating regulations, offering long term performance and compliance.

• Built-In Reliability: Manufactured by Navien, a trusted global heating brand known for innovation, quality, and long-lasting performance.

• Ideal for Rural & Off-Grid Homes: Perfect for properties without access to mains gas offering an efficient oil heating solution with the convenience of a combi boiler.

Key Features:

• HVO compatible
• Future proof Blue Flame technology delivers superior efficiency and ultra-low NOx emissions
• Lightweight design for easy installation
• Clean and modern design
• Stainless steel heat exchangers for optimum durability and long term efficiencies
• Flue venting up to 21m in horizontal and vertical arrangements
• Flexible installation options thanks to compact design and flueing
• Achieves highest 3-star mark in DHW performance (in accordance with EN Regulations)
• 3-zone ready with Smart Plus control pack
• Text driven integral display for intuitive control and fuel consumption figures
• Class leading energy efficiency for reduced running costs
• 10-year parts and labour warranty as standard

Technical Specifications:

• Brand: Navien
• Model No: PLCB0021SD001
• Product Type: Combi Oil Boiler
• Heat Output 80/60°C: 16/21kW
• Heat Output 50/30°C: 23.0kW
• Maximum Flow Rate (±15%): 14L/min
  
• DHW Control Range: 30-60°C (Default 50°C)
• Flue Size: Coaxial Plastic Ø 60/100
• Max Horizontal Length: 20m
• Max Vertical Length: 21m
• Combi Weight: 91 Kg
• ErP Efficiency: ErP A (93%)
• ErP Efficiency with Smart Plus (x3): ErP A+ (98%)
• NOx Emission Rate: 57.2mg/kWh
• Dimensions (Regular/System Model): 600mm x 600mm x 860mm
• Manufacturer Warranty: 10 Years
  
  

  What’s in the Box – Navien LCB700 Blue Flame 28kW Internal Combi Oil Boiler

  When you purchase the Navien LCB700 28kW Internal Combi Oil Boiler, you receive everything needed for a professional, efficient installation:

  • 1 x Navien LCB700 28kW Internal Combi Oil Boiler Unit
    A compact, high-efficiency combi boiler with integrated Blue Flame burner and smart-ready interface.

  • 1 x Combined PRV and Condensate Drain
    Factory-fitted to simplify installation and reduce time on site.

  • 1 x Built-in Circulation Pump & Expansion Vessel
    Pre-installed to reduce component costs and installation steps.

  • 1 x User-Friendly Control Panel
    Easy-to-navigate display for temperature control, diagnostics, and settings adjustments.

  • 1 x Installation & User Manual
    Includes full technical instructions for installers and an end-user operating guide.

  • 1 x Wall Mounting Bracket Kit
    Fixing hardware for secure and stable wall-mounted installation

  Please Note:

  • Flue kit and smart controls (such as Navien Smart Plus or OpenTherm thermostats) are sold separately.

  • Unit is designed for indoor installation only.