
Details
The Tinderbox Medium wood burner from Mi-Fires boasts an impressive efficiency of 85.1% making it one of the most efficient and eco-friendly stoves on the market. It is credited with both Ecodesign and DEFRA approvals and has an A+ energy rating.
The Mi-Fires Tinderbox Medium is both DEFRA approved and SIA Ecodesign ready which means it can be used in smoke controlled areas and produces a very low amount of emissions. It features three air supplies ensuring an optimum burn with every use and a powerful airwash system will help keep the panoramic viewing window free from soot build up.
This wood burning stove is suitable for use with a 12mm thick hearth and with low clearances to combustible materials makes it easy to install anywhere in the room. An optional external air kit is also available for new builds or rooms with high insulation.
Features
- Robust steel construction with durable cast iron door for long-lasting wood stove performance
- Firebox lined with 30mm vermiculite panels for enhanced heat retention and efficient combustion
- Fully SIA Ecodesign Ready, compliant with the latest clean air standards for eco-friendly heating
- DEFRA Approved, ideal for use in UK smoke controlled areas to reduce emissions
- 5kW nominal heat output, perfect for heating medium-sized rooms with consistent warmth
- High efficiency rating of 85.1% to maximise fuel savings and reduce running costs
- Designed exclusively for burning wood, offering a clean and renewable heating product
- Advanced primary, secondary, and tertiary air supply system for optimal combustion and cleaner burn
- A+ energy rating ensures environmentally responsible and cost-effective heating
- Large panoramic viewing window with powerful airwash system keeps glass clear for a beautiful flame view
- Optional external air kit available for airtight and modern home installations
- Compatible with 12mm hearth installation for easy and flexible fitting options



Additional Specifications
SKU stands for Stock Keeping Unit feel free to quote this reference so we can easily identify the product you're looking at.
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137-M-TINDERBOX |
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Mi-Fires |
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Wood Burning |
DEFRA Approved stoves are those which can legally be used in smoke-controlled areas to burn wood. Using unauthorised fuels can incur penalties and fines.
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Yes |
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5" (125mm) |
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Top & Rear Interchangeable |
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410mm |
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530mm |
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352mm |
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124mm |
The minimum distance required on either side to combustible materials.
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400mm |
The minimum distance required behind to combustible materials.
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250mm |
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85.1% |
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64kg |
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Steel Body, Cast Iron Door |
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Contemporary, Timeless, Traditional |
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Black |
The energy rating of an appliance determines how efficient it is based on the energy it consumes during typical use. Appliances are tested on a scale of A to G, with A being the most efficient product of its class.
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A+ |
External combustion or a direct air supply allows the stove to take its combustion air from outside the room the stove is installed in.
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Yes |
If yes this stove can be installed onto a 12mm deep non-combustible hearth, without the need for a constructional hearth.
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Yes |
The heat output of a stove or fireplace is conveyed in kilowatts (kW). The larger the room the more output you'll need from your room heater.
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5kW |
Heat Output Estimator
Unsure what size of Stove or Fire you need?
Try our handy Kilowatt Calculator to give you a rough idea what size of appliance you will need for your room.
Showroom
Yorkshire Showroom - Open
StovesAreUs, Huddersfield, offers a 2000 sqft showroom of the best in home heating, furniture, outdoor cooking, and electrical appliances, including range cookers and ovens. Please visit our showroom page for details on opening times.
We're not at full capacity in our new showroom just yet, please bare with us, there's more products being added daily. We recommend giving us a call before travelling to ensure we have on display what you're looking for.
Our showroom is conveniently situated in Huddersfield with easy M62 access for visitors travelling from Leeds, Manchester, York and Liverpool. The shop features well-known brands such as Rangemaster, AGA, Gazco, Kettler, Ooni and more with exclusive offers and deals you can only get by visiting our brand-new Huddersfield showroom.
Delivery & Returns
Delivery Information
PDFs
Please click on the links below to view or download the manual for this product.
Product Questions (1)
Mi-Fires Tinderbox Medium Wood Burning Eco Stove

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