The MI-Fire Derwent Small Wood Burning Stove is a compact cast iron stove designed to deliver efficient 4kW heating, traditional stove character and practical installation flexibility in a smaller format. With its 79.2% efficiency, A energy rating, Ecodesign 2022 compliance and Smoke Control Area Exempt status, it is a strong choice for customers wanting a classic wood-burning stove that suits more modest room sizes without compromising on modern standards.
Built in full cast iron, the Derwent Small offers the solid feel, durability and heat-retaining qualities that many customers still value in a traditional stove. Cast iron helps the stove feel reassuringly robust while also giving it a timeless fireside appearance that works particularly well in cottages, snug rooms and more classic interior settings. The more compact proportions of the Small Derwent make it especially useful where a larger stove would dominate the room or exceed the likely heating requirement.
With a 4kW output, this stove is well suited to smaller and medium-sized spaces where a lower-output appliance is the more appropriate fit. Its 79.2% efficiency and A energy rating help ensure that the stove combines classic material quality with cleaner, more effective modern performance. It is also described as being among the most efficient stoves of its size in the UK, while offering very low particulate emissions in its class, which adds further appeal for customers who want a more responsible wood-burning option.
The stove offers both top and rear flue outlet positions, making installation more flexible depending on the fireplace opening or flue arrangement. It is also suitable for a 12mm hearth, which can be an important practical benefit in the right setting. Clearance distances to combustible and non-combustible materials, along with hearth projection and furniture spacing, are clearly defined to help support installation planning.
At 50kg, the MI-Fire Derwent Small remains compact and manageable while still delivering the solid look and feel associated with cast iron construction. The result is a practical, efficient and characterful stove for customers wanting a smaller traditional wood burner.
Key Features
- 4kW wood burning stove
- Full cast iron construction
- 79.2% efficiency
- A energy rating
- Ecodesign 2022 compliant
- Smoke Control Area Exempt
- Compact traditional stove design
- Top or rear flue outlet
- Suitable for 12mm hearth
- UK-designed stove range
- Low-emission wood burning performance
- Ideal for smaller rooms
Expert Insight
A 4kW cast iron stove can be a particularly smart choice where room size is limited, because it allows you to keep the traditional look and feel of a proper wood burner without over-sizing the appliance for the space. The 12mm hearth compatibility is another practical advantage that can make installation easier in the right setting.
Suitability
The MI-Fire Derwent Small Wood Burning Stove is well suited to snugs, cottages, smaller living rooms, and homes wanting a compact cast iron wood stove with classic styling and modern performance standards.
Installation / Technical Notes
The MI-Fire Derwent Small offers 4kW output, 79.2% efficiency, and an A energy rating. It is Ecodesign 2022 compliant, Smoke Control Area Exempt, and built from full cast iron. It weighs 50kg. The top spigot outlet sits 120mm from the rear of the stove, while the rear spigot outlet is 335mm from the floor. Distance to combustibles is Side: 440mm, Back: 240mm, Corners: 360mm, and distance to non-combustibles is Side: 75mm, Back: 50mm. Hearth projection is Front: 300mm, Side: 150mm, and distance to furniture is Front: 770mm. This stove is suitable for a 12mm hearth.





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