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This stove does NOT have a catalyser - Woodburning Only.
A traditionally styled wood burning stove with advanced combustion technology and outstanding efficiency.
New Eco Design ready models now featuring Woodbox® technology.
The Nestor Martin Harmony 23, also known as the H23, combines classic stove design with modern Ecodesign performance. Part of Nestor Martin’s highly regarded Harmony range, this elegant cast iron stove offers a natural flame picture, excellent efficiency, and reliable warmth for everyday comfort.
Designed for burning seasoned wood only, the Harmony 23 features a catalyser and advanced combustion technology to help achieve cleaner, more efficient burning. With a nominal heat output of 4.6kW, it is ideal for average-sized rooms and spaces where controlled, efficient heat is required.
Traditional Style, Modern Performance
The Harmony 23 has the timeless appearance expected from a traditional cast iron stove, making it a natural fit for both classic and contemporary interiors. Behind its traditional styling is a highly developed combustion system designed to improve efficiency, reduce emissions, and deliver a more natural flame effect.
With an impressive 86% efficiency and an A energy rating, the Harmony 23 is built to make excellent use of fuel while providing dependable warmth.
Wood Burning with Catalyser
The Harmony 23 is a dedicated wood burning stove and is suitable for use with seasoned wood only. Its catalyser helps support cleaner combustion and efficient heat production, making it an environmentally conscious choice for modern homes.
This model is available with the catalyser in either top flue or rear flue exit positions, so please ensure the correct option is selected when ordering.
Advanced Combustion Technology
Nestor Martin’s Harmony range represents a significant step forward in combustion design. The Harmony 23 features ZR Combustion Technology, Plexus Air Control, and a convection system to help deliver efficient, controlled burning with minimal supervision.
The airwash system helps keep the glass clearer, while double-glazed glass improves performance and enhances the flame view.
Handle Options
The Harmony 23 is supplied as standard with a nickel handle. Optional brass or black handle upgrades are also available, complete with matching hinge pins, allowing you to tailor the stove’s appearance to suit your fireplace and interior.
Key Features
- Dedicated wood burning stove
- Suitable for seasoned wood only
- Ecodesign compliant
- A energy rating
- 4.6kW nominal heat output
- 86% efficiency
- Catalyser for cleaner, efficient combustion
- Available with top or rear flue exit
- Plexus Air Control
- ZR Combustion Technology
- Double-glazed glass
- Airwash system to help keep the glass clear
- Rear heat shield
- Convection system
- Optional closed combustion
- Smoke Control Area approved
- Suitable for use with a glass floor plate
- Nickel handle supplied as standard
- Optional brass or black handle with matching hinge pins
Technical Specifications
Specification Detail Height 659mm Width 610mm Depth 369mm Weight 124kg Nominal Output 4.6kW Efficiency 86% Energy Rating A CO @ 13% 0.02 Maximum Log Length 330mm Distance to Combustible Materials - Rear 450mm Distance to Combustible Materials - Side 300mm Height to Centre of Rear Outlet 536mm Optional Closed Combustion Yes Smoke Control Yes Suitable for Glass Floor Plate Yes Standard EN 13240 Recommended Heating Area Up to 96m³
The Nestor Martin Harmony 23 H23 Ecodesign Wood Burning Stove is an efficient and beautifully styled stove for those who want traditional looks, cleaner wood burning performance, and the reassurance of modern Ecodesign technology.
This stove does NOT have a catalyser - Woodburning Only.
A traditionally styled wood burning stove with advanced combustion technology and outstanding efficiency.
New Eco Design ready models now featuring Woodbox® technology.
The Nestor Martin Harmony 23, also known as the H23, combines classic stove design with modern Ecodesign performance. Part of Nestor Martin’s highly regarded Harmony range, this elegant cast iron stove offers a natural flame picture, excellent efficiency, and reliable warmth for everyday comfort.
Designed for burning seasoned wood only, the Harmony 23 features a catalyser and advanced combustion technology to help achieve cleaner, more efficient burning. With a nominal heat output of 4.6kW, it is ideal for average-sized rooms and spaces where controlled, efficient heat is required.
Traditional Style, Modern Performance
The Harmony 23 has the timeless appearance expected from a traditional cast iron stove, making it a natural fit for both classic and contemporary interiors. Behind its traditional styling is a highly developed combustion system designed to improve efficiency, reduce emissions, and deliver a more natural flame effect.
With an impressive 86% efficiency and an A energy rating, the Harmony 23 is built to make excellent use of fuel while providing dependable warmth.
Wood Burning with Catalyser
The Harmony 23 is a dedicated wood burning stove and is suitable for use with seasoned wood only. Its catalyser helps support cleaner combustion and efficient heat production, making it an environmentally conscious choice for modern homes.
This model is available with the catalyser in either top flue or rear flue exit positions, so please ensure the correct option is selected when ordering.
Advanced Combustion Technology
Nestor Martin’s Harmony range represents a significant step forward in combustion design. The Harmony 23 features ZR Combustion Technology, Plexus Air Control, and a convection system to help deliver efficient, controlled burning with minimal supervision.
The airwash system helps keep the glass clearer, while double-glazed glass improves performance and enhances the flame view.
Handle Options
The Harmony 23 is supplied as standard with a nickel handle. Optional brass or black handle upgrades are also available, complete with matching hinge pins, allowing you to tailor the stove’s appearance to suit your fireplace and interior.
Key Features
- Dedicated wood burning stove
- Suitable for seasoned wood only
- Ecodesign compliant
- A energy rating
- 4.6kW nominal heat output
- 86% efficiency
- Catalyser for cleaner, efficient combustion
- Available with top or rear flue exit
- Plexus Air Control
- ZR Combustion Technology
- Double-glazed glass
- Airwash system to help keep the glass clear
- Rear heat shield
- Convection system
- Optional closed combustion
- Smoke Control Area approved
- Suitable for use with a glass floor plate
- Nickel handle supplied as standard
- Optional brass or black handle with matching hinge pins
Technical Specifications
| Specification | Detail |
|---|---|
| Height | 659mm |
| Width | 610mm |
| Depth | 369mm |
| Weight | 124kg |
| Nominal Output | 4.6kW |
| Efficiency | 86% |
| Energy Rating | A |
| CO @ 13% | 0.02 |
| Maximum Log Length | 330mm |
| Distance to Combustible Materials - Rear | 450mm |
| Distance to Combustible Materials - Side | 300mm |
| Height to Centre of Rear Outlet | 536mm |
| Optional Closed Combustion | Yes |
| Smoke Control | Yes |
| Suitable for Glass Floor Plate | Yes |
| Standard | EN 13240 |
| Recommended Heating Area | Up to 96m³ |
The Nestor Martin Harmony 23 H23 Ecodesign Wood Burning Stove is an efficient and beautifully styled stove for those who want traditional looks, cleaner wood burning performance, and the reassurance of modern Ecodesign technology.
