What Navien does

Navien Ltd is the UK subsidiary of KD Navien Group, a South Korean heating equipment manufacturer founded in 1978 that ranks as the fourth-largest gas boiler producer globally. Operating in the UK since 2014 and headquartered in Guildford, Navien designs, distributes, and supports high-efficiency residential heating systems — gas condensing combi and system boilers, blue flame oil boilers, R290 air source heat pumps, and tankless gas water heaters — primarily for UK homeowners. Products reach end users through a network of over 400 plumbing and builder merchants and a tiered certified installer programme (Navien Installer, Navien Pro, Navien Service Agent), supported by E-training and the Navien Choice loyalty scheme.

The product portfolio is differentiated by a vertically integrated proprietary technology stack. NCB ON hot water prioritisation enables stable simultaneous delivery to three bathrooms; ON AI smart heating control integrates OpenWeatherMap forecast data, geofencing, behavioural usage learning, Smart Diagnostics, and FOTA updates to achieve Boiler Plus compliance and optimise energy use; the NaviCirc recirculation valve cuts water waste by up to 7,787 litres per year; and the PEM750 air source heat pump uses low-GWP R290 refrigerant to deliver SCOP of 4.87 and an A+++ ErP rating while operating at ambient temperatures down to -25°C. Hardware is backed by warranties of up to 12 years, conditional on annual servicing by certified agents.

Navien's revenue model is anchored on one-time hardware sales through merchants and direct channels, supplemented by recurring after-sales service and warranty-linked maintenance delivered via its installer network and a service partnership with British Gas. Go-to-market combines channel partner distribution, event-driven demand generation (notably InstallerSHOW), installer training and loyalty programmes, and direct consumer engagement through the company website, an AI chatbot, and a call centre. Manufacturing remains centralised in South Korea at the group's 2 million-unit-per-year single-site facility.

Name

Navien

Legal name

KyungDong Navien

Website

https://navien.co.uk

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

11–50 employees

Short description

Navien Ltd, the UK subsidiary of South Korean KD Navien Group, manufactures and distributes high-efficiency residential heating equipment — gas/oil boilers, R290 heat pumps, water heaters, and smart controls — to UK homeowners via over 400 merchants and a certified installer network.

Ownership category

akta.pro rank

Product category

Residential Heating Equipment

NAICS

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

akta.pro secondary industry

Refrigeration Components & Controls (Compressors, Valves, Sensors) (IMAHAKAH)

Keywords

• Condensing boilers
• Heat pumps
• Tankless water heaters
• Oil boilers
• Smart heating controls

Headquarters

HQ city

Guildford

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Boiler and heat pump hardware sales: Navien generates revenue primarily from the sale of physical heating products — gas condensing boilers, oil boilers, air source heat pumps, water heaters, and smart controls. Products are sold through a network of over 400 merchants nationwide and directly to consumers. Revenue is one-time at point of sale, with long warranty periods (up to 12 years) representing post-sale service commitments.
2. After-sales service and warranty: Navien provides annual servicing requirements linked to warranty validity. Service agents attend customers within 48 hours. Service revenue accrues from repair calls, annual maintenance, and parts replacement under and post-warranty.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels8 records

Core offering

Navien manufactures high-efficiency residential and light commercial heating products, including gas condensing boilers (NCB series), blue flame oil boilers (LCB series), air source heat pumps (PEM series), tankless gas water heaters (NPE), and heat pump water heaters (NWP). The company sells these appliances primarily through a UK merchant and professional installer network, with smart controls (Smart Plus, Smart Plus ON AI) and accessories such as the NaviCirc recirculation valve. A separate service and warranty partnership is operated with British Gas for installed units.

Product overview

Navien is a heating equipment manufacturer offering a comprehensive portfolio of gas condensing boilers, blue flame oil boilers, air source heat pumps, and tankless water heaters. The core product lines include the NCB ON gas boiler range (NCB700 ON, NCB500 ON, NCB300, NCB-CE) featuring proprietary NCB ON hot water prioritisation technology enabling simultaneous hot water delivery to multiple bathrooms, the LCB700 Blue Flame oil boiler range, the PEM750 R290 refrigerant heat pump, and NPE tankless gas water heaters. These products are complemented by smart control solutions including the Smart Plus Controller and Smart Plus ON AI Controller with AI-powered optimization, the NaviCirc recirculation valve accessory, and the NAW3000 wiring centre for heat pump systems. The company also holds patents for NCB ON technology (hot water recirculation maximisation) and ON AI technology (artificial intelligence heating control). Navien has been in the UK since 2014 and is the fourth largest gas boiler manufacturer globally.

Differentiator

Problem solved

Functional benefit

Brands

• NCB ON: Boiler technology that maximises recirculation of domestic hot water while reducing water wastage, available in NCB700 ON and NCB500 ON Combi Crossover boilers
• ON AI
• NaviCirc

Products and services

• NCB700 ON Gas Condensing Boiler Premium residential gas condensing boiler featuring NCB ON technology, designed for UK homeowners and installed by accredited professional heating engineers; offers up to 10-year warranty and high efficiency.
• NCB500 ON Gas Condensing Boiler Mid-tier residential gas condensing boiler featuring NCB ON self-modulating technology with up to 7-year warranty, installed by Navien accredited installers.
• NCB300 Gas Condensing Boiler Entry-level residential gas condensing boiler positioned for cost-conscious UK homeowners and installer-led replacement jobs.
• NCB-CE Gas Condensing Boiler Commercial-grade gas condensing boiler aimed at light commercial applications such as small hotels, offices and nursing homes.
• LCB700 Blue Flame Oil Boiler Blue flame oil boiler designed for off-grid residential and commercial properties where mains gas is unavailable.
• PEM750 Air Source Heat Pump Monobloc air source heat pump using ultra-low-GWP R290 refrigerant, providing low-carbon space heating and hot water for UK residential installations.
• NPE Tankless Gas Water Heater Condensing tankless gas water heater with ComfortFlow integrated recirculation, delivering endless hot water on demand for residential use; Navien is the number one tankless water heater brand in North America.
• NWP 500 Heat Pump Water Heater Heat pump water heater providing efficient electric domestic hot water production for residential UK homes.
• Smart Plus Boiler Control Smart connected boiler control compatible with Navien NCB gas condensing boilers, allowing remote operation and diagnostics for UK homeowners.
• Smart Plus ON AI Boiler Control Smart boiler control with ON AI self-modulating intelligent technology, providing AI-driven load prediction and remote operation for premium NCB ON boilers.
• NaviCirc Recirculation Valve Internal recirculation pump valve accessory delivering instant hot water at the tap when fitted to a Navien boiler.

Quantifiable outcome

• NCB700 ON saves 7,787 litres of water and 38% gas per year — approximately £513 annual saving
• +3 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability5 records

Feature7 records

Partnerships

Two partnerships are on record, tiered core.

• British GascoreStrategic or Co-development PartnerNavien has a service partnership with British Gas to support its expanded product portfolio in the UK market, including boilers, heat pumps, and water treatment systems. British Gas engineers are trained to service Navien equipment, broadening the service network for Navien customers.
• Navien ChoicecoreGTM or Marketing PartnerNavien Choice is a loyalty and incentivisation programme for registered installers. Installers earn rewards and cashback (such as £100 per registered LCB700 unit) for promoting and installing Navien products, strengthening the installer channel relationship.

Scale indicators8 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• Worcester Bosch: UK's largest gas boiler brand and the market-share leader among merchants and installers. Directly competes with Navien in gas combi boilers, system boilers and increasingly heat pumps under the Bosch Home Comfort portfolio.
• Vaillant: Major UK boiler and heat pump brand owned by the Vaillant Group, offering combi boilers (ecoFIT), system boilers and the aroTHERM heat pump range. Competes head-to-head with Navien across merchant channels and installer relationships.
• Baxi (BDR Thermea Group): UK-based boiler manufacturer and part of BDR Thermea, also offering heat pumps under the Baxi Assure range. Direct competitor to Navien in residential gas and oil boilers as well as emerging heat pump categories.
• Ideal Heating: Established UK boiler brand (Logic, Vogue) now expanding into heat pumps with the Ideal Air range. Competes directly with Navien in UK merchant and installer channels.
• Viessmann Climate Solutions (UK): German manufacturer of high-efficiency boilers, heat pumps (Vitocal) and smart controls with a UK sales and installer network. Competes with Navien across all three product pillars, particularly in the premium efficiency segment.
• Ariston Group: Italian heating and water heating manufacturer with UK presence (Ariston, Ideal-branded products acquired historically), offering combi boilers and heat pumps. Comparable to Navien in product breadth and target market.
• Rinnai UK: Japanese-origin manufacturer of continuous-flow (tankless) gas water heaters and hydrogen-ready boilers. Directly comparable to Navien's NPE water heater range and overlapping product positioning.

Broad incumbents

• Daikin UK: Global heat pump leader (Daikin Altherma) with established UK installer network and broader HVAC portfolio. Comparable on the heat pump side where Navien is launching PEM750 and on smart controls integration.
• Mitsubishi Electric (UK): Major air-source heat pump supplier (Ecodan) with deep UK installer training programmes. Competes with Navien's PEM750 in the residential heat pump segment where both serve new-build and retrofit demand.

Regional players

• Samsung Climate Solutions (UK): Korean chaebol-affiliated heat pump and air conditioning brand entering the UK residential heating market. Thematically comparable to KD Navien as a Korean competitor with technology DNA and global manufacturing scale.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/kdnavienuk
• YouTubeyoutube.com/channel/UCC1Js5Fa6To_MrK0cLrNSEA
• Facebookfacebook.com/KDNavienuk
• LinkedInlinkedin.com/company/navien-uk
• Instagraminstagram.com/navienuk

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Navien