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Excellent 4.7 out of 5
Excellent 4.7 out of 5

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Navien LCB700 21kW Internal Combi Oil Boiler

Navien LCB700 21kW Internal Combi Oil Boiler Boiler
Typical Price (inc VAT)
£N/A
Typical installation Cost (inc VAT)*
£500 - £1,000

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Make Navien
Model LCB700 21kW Internal Combi Oil Boiler
Is Condensing Condensing
Efficiency Rating 93%
Standard Warranty 10 Years
Band Rating A Rating
ERP Rating A Heat A Water
Central Heating Max. Output 23 kW
Flow Rate 14 l/min
LPG Compatible No
Mounting Floor Standing
Typical Price (inc VAT) £N/A
Typical installation Cost (inc VAT)* £500 - £1,000

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Navien LCB700 21kW Internal Combi Oil Boiler

The Navien LCB700 is a highly efficient floor-standing condensing oil boiler designed for internal installation.

How efficient is the Navien LCB700?

As a condensing oil boiler, the Navien LCB700 can perform at a highly efficient level. It has an ErP A-rating and space heating efficiency of 93%. When paired with the Navien Smart Plus thermostat, the LCB700 is even more efficient with an ErP A+ rating and 98% efficiency.

Is the output rating suitable for my home?

This model has a central heating output rating of 21 kW which makes it well suited to homes with fewer than 10 radiators.

Are other outputs available in the LCB700 range?

The Navien LCB700 range includes combi, system and regular boilers designed for both internal and external installation. This 21 kW model is the smallest in the range with higher central heating outputs of 28 kW and 36 kW also available.

Is a combi boiler suitable for my home?

Combi boilers directly deliver central heating and domestic hot water on demand as and when needed. This removes the need for any additional tanks or cylinders - other than an oil storage tank in the case of oil boilers.

For this reason, combi boilers are a great choice for small to medium-sized properties with 1-2 bathrooms. Larger properties would be better suited to a system boiler as they store hot water in a cylinder so can meet higher demands.

How long is the warranty period?

Navien LCB700 boilers come with a lengthy warranty period of 10 years which will see that you’re well covered in the unlikely event of a fault.

What are the key features of the Navien LCB700?

Navien LCB700 boilers deliver class-leading efficiency thanks to a stainless steel heat exchanger and blue flame technology. As well as guaranteeing efficiency, Navien blue flame technology also delivers low NOx emissions. The unit itself is lightweight, weighing only 67 kg and offers flexible installation.

With the addition of the Navien Smart Plus thermostat the efficiency of the boiler is increased and the unit can check the weather forecast. This allows the heating system to know when cold weather is coming and adjust the central heating accordingly.

How big is the Navien LCB700?

The Navien LCB700 combi boiler has dimensions of 600 x 600 x 860mm (HxWxD) and thanks to flexible flue options you will have greater choice with where to install the boiler.

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* This is a guide price for a straightforward, like-for-like boiler replacement. Installation costs will vary dependent on work required.

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Navien LCB700 21kW Internal Combi Oil Boiler Boiler

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Navien LCB700 21kW Internal Combi Oil Boiler
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Why not compare these similar boilers?
Boiler Model kW Efficiency Warranty Typical Price
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Navien NCB 33kW System Gas Boiler 33kw 93% 7 years £N/A VIEW
Navien LCB700 21kW Internal System Oil Boiler 21kw 93% 10 years £N/A VIEW
Navien LCB700 28kW Internal System Oil Boiler 28kw 93% 10 years £N/A VIEW
Navien LCB700 36kW Internal System Oil Boiler 36kw 93% 10 years £N/A VIEW
Navien LCB700 21kW Internal Regular Oil Boiler 21kw 93% 10 years £N/A VIEW
Navien LCB700 28kW Internal Regular Oil Boiler 28kw 93% 10 years £N/A VIEW
Navien LCB700 36kW Internal Regular Oil Boiler 36kw 93% 10 years £N/A VIEW
Navien LCB700 21kW External System Oil Boiler 21kw 93% 10 years £N/A VIEW
Navien LCB700 28kW External System Oil Boiler 28kw 93% 10 years £N/A VIEW
Navien LCB700 36kW External System Oil Boiler 36kw 93% 10 years £N/A VIEW
Navien LCB700 21kW External Regular Oil Boiler 21kw 93% 10 years £N/A VIEW
Navien LCB700 28kW External Regular Oil Boiler 28kw 93% 10 years £N/A VIEW
Navien LCB700 36kW External Regular Oil Boiler 36kw 93% 10 years £N/A VIEW
Navien LCB700 21kW Internal Combi Oil Boiler 23 kw 93% 10 years £N/A VIEW
Navien LCB700 28kW Internal Combi Oil Boiler 30.3 kw 93% 10 years £N/A VIEW
Navien LCB700 36kW Internal Combi Oil Boiler 39 kw 93% 10 years £N/A VIEW
Navien LCB700 21kW External Combi Oil Boiler 23 kw 93% 10 years £N/A VIEW
Navien LCB700 28kW External Combi Oil Boiler 30.3 kw 93% 10 years £N/A VIEW
Navien LCB700 36kW External Combi Oil Boiler 39 kw 93% 10 years £N/A VIEW

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Excellent 4.7 out of 5
Excellent 4.7 out of 5

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