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Navien Boilers

As the world's fourth-largest gas boiler manufacturer, Navien has built a global reputation for designing reliable, energy-efficient, and easy-to-install boilers since 1978.

Navien is at the forefront of condensing technology. Their boilers are meticulously built in the world's largest single-site manufacturing plant for heating products. With over 40 years of experience, Navien helps Scottish homeowners reduce their energy bills and carbon emissions without compromising on comfort.

01

World's 4th largest gas boiler manufacturer

Trusted by thousands of Scottish homeowners for reliability and performance.

02

Class-leading stainless steel heat exchangers

Trusted by thousands of Scottish homeowners for reliability and performance.

03

Advanced robotic QC (55 checks per second)

Trusted by thousands of Scottish homeowners for reliability and performance.

Available Navien Models

Navien NCB300-28
Gas/LPGCombi5 Year Warranty

NCB300-28

Output: 28kW
Flow Rate: 11.5L/min
From £2,400
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Navien NCB300-30
Gas/LPGCombi5 Year Warranty

NCB300-30

Output: 30kW
Flow Rate: 12.3L/min
From £2,500
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Navien NCB300-37
Gas/LPGCombi5 Year Warranty

NCB300-37

Output: 37kW
Flow Rate: 15.2L/min
From £2,700
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Navien NCB700-54
Gas/LPGCombi12 Year Warranty

NCB700-54

Output: 54kW
Flow Rate: 22.1L/min
From £4,000
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Navien NCB500-18S
Gas/LPGSystem10 Year Warranty

NCB500-18S

Output: 18kW
From £3,100
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Navien NCB500-24S
Gas/LPGSystem10 Year Warranty

NCB500-24S

Output: 24kW
From £3,220
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Navien NCB500-30S
Gas/LPGSystem10 Year Warranty

NCB500-30S

Output: 30kW
From £3,330
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Navien LCB700-21 (Internal)
OilCombi10 Year Warranty

LCB700-21 (Internal)

Output: 21kW
Flow Rate: 16L/min
From £5,653
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Navien LCB700-21 (External)
OilCombi10 Year Warranty

LCB700-21 (External)

Output: 21kW
Flow Rate: 16L/min
From £5,653
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Navien LCB700-28 (Internal)
OilCombi10 Year Warranty

LCB700-28 (Internal)

Output: 28kW
Flow Rate: 20.6L/min
From £5,475
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Navien LCB700-28 (External)
OilCombi10 Year Warranty

LCB700-28 (External)

Output: 28kW
Flow Rate: 20.6L/min
From £5,737
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Navien LCB700-36 (Internal)
OilCombi10 Year Warranty

LCB700-36 (Internal)

Output: 36kW
Flow Rate: 22.8L/min
From £5,837
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Navien LCB700-36 (External)
OilCombi10 Year Warranty

LCB700-36 (External)

Output: 36kW
Flow Rate: 22.8L/min
From £6,099
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Navien LCB700-21S (Internal)
OilSystem10 Year Warranty

LCB700-21S (Internal)

Output: 21kW
From £4,524
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Navien LCB700-21S (External)
OilSystem10 Year Warranty

LCB700-21S (External)

Output: 21kW
From £4,656
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Navien LCB700-28S (Internal)
OilSystem10 Year Warranty

LCB700-28S (Internal)

Output: 28kW
From £4,608
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Navien LCB700-28S (External)
OilSystem10 Year Warranty

LCB700-28S (External)

Output: 28kW
From £4,745
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Navien LCB700-36S (Internal)
OilSystem10 Year Warranty

LCB700-36S (Internal)

Output: 36kW
From £4,945
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Navien LCB700-36S (External)
OilSystem10 Year Warranty

LCB700-36S (External)

Output: 36kW
From £5,380
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Your Installation Process

From order to a warm home in 5 expert steps.

draining an old rusty boiler into a puddle of water
01

Drain & Disconnect

Old system is safely drained and removed.

powerflush machine connected to radiator system clearing sludge
02

System Flush

Radiators cleared of damaging iron oxide sludge.

engineer mounting new boiler on wall with precision level and brackets
03

New Installation

Precision mounting and connection of your unit.

gas boiler pressure valve gauge showing correct pressure reading
04

Test & Commission

Gas safety checks and controls setup.

official warranty approved stamp on certificate document
05

Warranty Activation

We register your warranty for complete cover.

The Heritage of Navien

Since 1978, Navien has been a pioneer in high-efficiency heating. In the UK, they have quickly become an established leader, especially with their NCB range which was designed specifically with installers and homeowners in mind. Their advanced robotic quality control system performs 55 inspections every second during manufacture.

Why Professionals Trust Navien

  • World's 4th largest gas boiler manufacturer
  • Class-leading stainless steel heat exchangers
  • Advanced robotic QC (55 checks per second)
  • High performance in low-pressure environments
  • Compact and lightweight for easy installation

Navien Frequently Asked Questions

Are Navien boilers reliable?

Yes, Navien boilers are exceptionally reliable. They perform over 250 manual inspections in addition to their robotic QC system to ensure every unit meets the highest standards before leaving the factory.

How long do Navien boilers last?

With regular annual servicing, a Navien boiler can last up to 20 years. They come with robust manufacturer warranties ranging from 5 to 12 years.

Get Your Fixed Price Navien Quote

No home visit needed. Answer a few questions and see your total installation price for a new Navien boiler instantly.

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Gas Safe Registered • 10-Year Warranties • 4.8/5 Customer Rating

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