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Nestor Martin Harmony 23 Wood Burning Stove

Price range: £3,305.00 through £3,395.00🏷️ £100 OFF over £1,000 — code GLASGOWFAIR

The Nestor Martin Harmony 23 Wood Burning Stove combines classic cast iron styling with advanced combustion technology, delivering efficient and eco-friendly heating for modern homes.

Its catalytic system, ZR Combustion Technology, and Plexus Air Control provide cleaner burning, excellent efficiency, and easy heat management, while the 4.6kW output suits medium-sized living spaces.

With an A energy rating, DEFRA approval, and timeless design, the Harmony 23 offers reliable wood-burning performance with lasting style and convenience.

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🏷️ Glasgow Fair Offer — £100 OFF this stove
Use code GLASGOWFAIR at checkout · orders over £1,000 · ends 7th August

Nestor Martin Harmony 23 Wood Burning Stove

The Nestor Martin Harmony 23 Wood Burning Stove blends timeless styling with advanced combustion technology, delivering an efficient and environmentally conscious heating solution for modern homes. As part of the traditionally inspired Harmony range, it combines elegant cast-iron craftsmanship with innovative engineering to provide impressive performance, exceptional flame quality, and reliable day-to-day heating.

Designed exclusively for seasoned wood, the Harmony 23 is an excellent choice for homeowners who appreciate the character of a traditional stove while benefiting from cleaner, more efficient combustion. Its classic styling complements both period properties and contemporary interiors, making it equally suited to a fireplace recess or as a freestanding focal point.

Advanced Combustion Technology

The Harmony range showcases Nestor Martin’s commitment to cleaner, more efficient wood burning. At the heart of the Harmony 23, an integrated catalytic combustion system maximises heat from every log while reducing emissions and improving overall efficiency.

Working alongside Nestor Martin’s ZR Combustion Technology, the catalytic system promotes a cleaner burn with minimal user intervention, producing attractive, natural flame patterns while making better use of seasoned wood.

Plexus Air Control allows you to manage combustion air easily, delivering consistent performance throughout the burn cycle.

Nestor Martin Harmony 23 Wood Burning Stove Efficient Heating for Everyday Living

The Harmony 23 delivers a nominal heat output of 4.6kW, making it well suited to average-sized living rooms and providing comfortable warmth throughout the colder months. Its impressive efficiency rating of 86% converts more of the energy generated into usable heat, improving fuel economy while maintaining a welcoming atmosphere.

The stove comfortably heats areas of up to 96m³ and achieves an A Energy Rating, reflecting its excellent efficiency credentials.

As a DEFRA Smoke Control approved appliance, the Harmony 23 can operate in smoke control areas, making it suitable for homes across many towns and cities throughout the UK.

Thoughtful Design and Installation Flexibility

The Harmony 23 combines traditional aesthetics with practical installation options to suit a variety of homes.

You can choose either a top or rear flue outlet, allowing the stove to match your installation requirements. Selecting the correct flue configuration when ordering ensures compatibility with your intended chimney or flue system.

Nestor Martin includes a rear heat shield as standard, while an optional closed combustion connection allows the stove to connect to an external air supply where required.

Measuring 610mm wide, 659mm high, and 369mm deep, the Harmony 23 offers a generous viewing window without occupying excessive floor space. Its robust 124kg construction reflects the stove’s high-quality build and long-term durability.

If you’re planning a new installation, understanding the wood-burning stove installation process can help you position the appliance correctly for both safety and performance. We also recommend professional stove installation to achieve the best possible results.

Nestor Martin Harmony 23 Wood Burning Stove Clear Flame View and Everyday Convenience

Nestor Martin designed the Harmony 23 to make enjoying a real wood fire as effortless as possible. Double-glazed viewing glass improves efficiency while providing an excellent view of the flames, creating a warm and inviting focal point within the room.

The integrated Air Wash system directs airflow across the inside of the glass to help keep the viewing window cleaner for longer, reducing soot build-up and maintaining a clearer flame picture between cleans.

The stove accommodates logs up to 330mm long, offering practical day-to-day usability for homeowners who regularly burn seasoned wood.

A Traditional Stove with Modern Performance

The Nestor Martin Harmony 23 successfully combines classic styling with some of the brand’s most advanced combustion technologies. Its efficient catalytic system, outstanding efficiency rating, flexible flue options, and thoughtful design features make it an excellent choice for homeowners seeking reliable heating alongside the timeless appeal of a real wood-burning stove.

To find out more about what a professional installation involves, visit our installation process page. For full technical documentation directly from the manufacturer, visit the official Nestor Martin product pages for the Nestor Martin Harmony 23 Wood Burning Stove.

Nestor Martin Harmony 23 Wood Burning Stove — Technical Specifications

Core Specifications

Specification Detail
Brand Nestor Martin
Series Harmony
Category Wood Burning Stove
Energy Efficiency Class A
Fuel Wood (Seasoned Wood Only)
Combustion Technology ZR Combustion Technology with Catalyser
Air Control Plexus Air Control
Glass Double Glazed
Convection System Yes
Airwash System Yes
Rear Heat Shield Yes
Flue Outlet Top or Rear
Optional Closed Combustion Yes
Smoke Control Approved Yes
Suitable for Glass Floor Plate Yes
Standard EN 13240
Dimensions See Dimensional Download Below

Performance Specifications

Specification Value
Nominal Heat Output 4.6 kW
Efficiency 86%
CO Emissions (13% O₂) 0.02%
Maximum Log Length 330 mm
Recommended Heat Area Up to 96 m³

Dimensions

Measurement Value
Height 659 mm
Width 610 mm
Depth 369 mm
Height to Centre of Rear Flue Outlet 536 mm

Weight

Specification Value
Weight 124 kg

Installation Clearances

Specification Value
Distance to Combustible Materials (Rear) 450 mm
Distance to Combustible Materials (Side) 300 mm

Downloads

7100DC976_1_S_H (003) H33 SE MANUAL 2025.pdf
Catalyst Removal and Cleaning.pdf
Weight 124 kg
Dimensions 36.9 × 61 × 65.9 cm
Handle Colour

Nickel (Standard), Brass, Black

Brand

Nestor Martin

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