Nestor Martin Harmony I Multi Fuel Stove
The Nestor Martin Harmony I Multi Fuel Stove gives homeowners complete control over their heating, whether burning seasoned logs or approved smokeless fuel. Traditional craftsmanship combines with practical innovation to deliver dependable performance, efficient combustion, and the flexibility to adjust heat output as conditions change.
Its robust construction, user-friendly controls, and Eco-design compliant technology make the Harmony I equally suited to traditional homes and contemporary interiors. It strikes an ideal balance between heating performance, ease of use, and long-term reliability, making it a practical choice for everyday living.
Precision Control for Efficient Heating
The Harmony I stands out thanks to its advanced combustion control system. An airwash control and thermostatic damper work together to give you precise control over the fire, whether you’re burning wood or smokeless coal.
This intelligent system maintains efficient combustion while allowing you to adjust the heat output to suit the room and the time of day. As a result, the stove responds quickly to changing conditions and uses fuel more economically, providing comfortable warmth without unnecessary consumption.
The Harmony I delivers a nominal heat output of 9kW with an efficiency rating of 76%, making it well suited to larger living spaces. It can comfortably heat areas of up to 360m³.
Designed for Everyday Convenience
Nestor Martin designed the Harmony I to make lighting and maintaining a fire as straightforward as possible.
A direct draught slide heats the flue quickly during lighting, helping the stove establish a strong draw and achieve faster, cleaner ignition. This practical feature reduces the effort needed to start a solid fuel fire and helps the stove reach optimum operating conditions more efficiently.
The side-loading door adds another level of convenience. You can load logs up to 400mm long from the side, reducing the need for frequent refuelling while helping prevent ash from spilling onto the hearth. This thoughtful design makes everyday use cleaner and more convenient.
Nestor Martin Harmony I multi-fuel Stove Built to Last
Nestor Martin has built its reputation on quality engineering, and the Harmony I reflects that commitment throughout its design.
The company manufactures the stove from durable, high-quality materials that withstand years of regular use while continuing to deliver reliable heating performance. At 150kg, the Harmony I offers the solid build quality homeowners expect from a premium multi-fuel stove, inspiring confidence in its long-term durability.
Its classic styling complements both traditional fireplace settings and contemporary living spaces.
Eco-design Compliant Performance
The Harmony I meets the latest Eco-design requirements, the European standard that reduces emissions and improves the environmental performance of wood and multi-fuel stoves.
An A Energy Rating reflects the stove’s ability to combine powerful heating with cleaner combustion, allowing homeowners to enjoy the comfort of a real fire while meeting modern efficiency standards. Low CO emissions of just 0.06% at 13% oxygen further highlight its clean-burning credentials.
Nestor Martin Harmony I multi-fuel Stove Installation Considerations
The Harmony I measures 670mm high, 604mm wide, and 391mm deep, giving it a substantial presence while offering an excellent balance between heating capacity and installation flexibility.
When installing the stove, maintain a clearance of 400mm from combustible materials at the rear and sides. The centre of the top flue outlet sits 164mm from the rear of the stove, while the rear flue outlet centre sits 484mm above the base. These dimensions help installers plan the flue configuration accurately.
If you’re planning a new installation, our wood-burning stove installation process explains what to expect from the initial survey through to completion. We also recommend professional stove installation to ensure the appliance performs safely and efficiently for years to come.
A Practical Multi-Fuel Stove for Modern Homes
The Nestor Martin Harmony I offers an excellent solution for homeowners who want the flexibility to burn either wood or smokeless fuel without compromising on performance or ease of use. Its thermostatic combustion controls, direct draught lighting system, and convenient side-loading design all work together to make everyday heating simpler, cleaner, and more efficient.
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 I Multi Fuel Stove.
Nestor Martin Harmony I Multi Fuel Stove — Technical Specifications
Core Specifications
| Specification | Detail |
|---|---|
| Brand | Nestor Martin |
| Model | Harmony I |
| Category | Multi Fuel Stove |
| Fuel Type | Wood & Smokeless Coal |
| Energy Efficiency Class | A |
| EcoDesign Ready | Yes |
| Standard | EN 13240 |
| Nominal Heat Output | 9 kW |
| Efficiency | 76% |
| CO Emissions (13% O₂) | 0.06% |
| Recommended Heating Area | Up to 360 m³ |
| Maximum Log Length | 400 mm |
| Airwash System | Yes |
| Thermostatic Damper | Yes |
| Direct Draught Slide | Yes |
| Side Loading Door | Yes |
| Dimensions | See Dimensional Download Below |
Dimensions
| Measurement | Value |
|---|---|
| Height | 670 mm |
| Width | 604 mm |
| Depth | 391 mm |
| Distance to Centre of Top Flue Outlet (from Rear) | 164 mm |
| Height to Centre of Rear Flue Outlet | 484 mm |
Weight
| Specification | Value |
|---|---|
| Weight | 150 kg |
Installation Clearances
| Clearance | Distance |
|---|---|
| Rear to Combustible Materials | 400 mm |
| Side to Combustible Materials | 400 mm |
Downloads
| Stanford 9, 9+, 12, 12+, Harmony I, Harmony III.pdf |
| Harmony I Energy Label.pdf |
| Harmony I Fiche.pdf |
| NM_Harmony 1 & 3 03 2024 UK.pdf |
| IN1188 Servicing Stanford 80 Harmony 1 and 3 2020.pdf |













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