Small Tinderbox Multifuel Stove, 5kW, ECODesign with single storey extension kit (137-SMF-TBOX-single)
Ready for installation. This package includes everything you need to install your stove in a single storey building. Perfect for garden rooms, extensions or one-storey homes. No existing chimney required. Our experts provide a free design service if you need a variation on this system. Give us a call on 01670 206 999 if you think you might need a few changes to this standard kit.

At a Glance
- Efficient, eco-friendly heating for small to medium-sized rooms
Multifuel capability: burns wood and smokeless fuels
Designed with ECODesign standards to meet stringent UK regulations
Complete single storey extension kit for compact spaces
Easy installation backed by our free design service
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 29th. This is based on current lead times for this product. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.
Warranty & Returns +
All our products come with warranties and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Best Price Match Guarantee +
We will match any price, like-for-like, on a retail basis. Give us a call if you find it cheaper and want to buy from us.
We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Summary
- Specs
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- FAQs
Small Tinderbox Multifuel Stove, 5kW, ECODesign :: with single storey extension kit :: with single... Discover the ultimate in eco-friendly, efficient heating with the Small Tinderbox Multifuel Stove, 5kW, ECODesign featuring a single storey extension kit. Designed for compact spaces across the UK, this multifuel stove incorporates advanced Cleanburn and Airwash systems for reliable, low-emission heat.
Perfect for modern living with easy installation and a free design service, elevate your home’s comfort and style with this top-rated fireplace solution that meets today’s stringent environmental standards.
Features & Benefits
Multifuel Operation
Enjoy versatile heating by using both wood and smokeless fuels, giving you flexibility and fuel savings.
EcoDesign Compliant
Meets rigorous EU and UK eco-efficiency standards for reduced emissions and sustainable heating.
Compact Single Storey Extension Kit
Ideal for limited spaces, this kit simplifies installation while maximising performance in snug areas.
Easy Integration
Designed for freestanding installations with seamless connections to flues and chimneys to enhance safety.
Free Design Service
Benefit from professional advice and planning support, ensuring your installation is perfectly tailored.
SKU: 137-SMF-TBOX-single
SKU | Product Name | Qty |
---|---|---|
37-125-005 | TWPro MB - Flat Adaptor - Ø 125 | 1 |
37-125-010 | TWPro MB - Pipe 1000mm - Ø 125 | 3 |
37-125-011 | TWPro MB - Pipe 500mm - Ø 125 | 1 |
37-125-112 | TWPro MB - Rain Cap with Mesh - Ø 125 | 1 |
58-125-096 | TWPro MB - Finishing Plate 0°-30° - Ø 125 | 1 |
58-125-082 | TWPro MB - Storm Collar - Ø 125 | 1 |
15-125-067 | Roof Support - Ø 125 | 1 |
12-7LT | MI-Flash - No 7 Metal Black EPDM 152-280mm 355x355 | 1 |
32-SK1 | Standard Fixing Kit | 1 |
Technical Specifications | |
---|---|
Nominal Heat Output | 5kW |
Heat Output Range | 4-7.5kW |
Energy Efficiency Rating | A+ |
Wood Burning Efficiency | 81% |
CO Emissions | 0.09% @ 13% O2 |
Maximum Log Length | 480mm |
Flue Outlet | 5' Top or Rear |
Dimensions | 550mm (H) x 579mm (W) x 383mm (D) |
Weight | 86kg |
Eco Design Approved | Yes |
Smoke Control Exempt | Yes |
Cleanburn System | Yes |
Airwash System | Yes |
Direct Air Kit | Optional |
Grate Option | Optional |
Package Components Details | 37-125-005, 37-125-011, 37-125-010, `SKU`, 58-125-082, 37-125-112, 58-125-096, `SKU`, 12-7LT, 32-SK1, 15-125-067 (TWPro MB - Flat Adaptor - u00d8 125, TWPro MB - Pipe 500mm - u00d8 125, TWPro MB - Pipe 1000mm - u00d8 125, `Product_Name`, TWPro MB - Storm Collar - u00d8 125, TWPro MB - Rain Cap with Mesh - u00d8 125, TWPro MB - Finishing Plate 0u00b0-30u00b0 - u00d8 125, `Product_Name`, MI-Flash - No 7 Metal Black EPDM 152-280mm 355x355, Standard Fixing Kit, Roof Support - u00d8 125) |
Package Components | 37-125-005, 37-125-011, 37-125-010, `SKU`, 58-125-082, 37-125-112, 58-125-096, `SKU`, 12-7LT, 32-SK1, 15-125-067 |
What our experts say!
"Our Small Tinderbox Multifuel Stove sets the standard in efficiency and eco-friendliness. With an 83% efficiency rating and A+ Energy certification, it's perfect for both trade and retail customers. National Flues offers reliable nationwide delivery and the best prices."
The Small Tinderbox Multifuel Stove is designed to provide efficient, eco-friendly heating for small to medium-sized rooms, using both wood and smokeless fuels.
National Flues is a trusted supplier of high-quality fireplaces and flues, serving both retail and trade customers across the UK. Known for competitive pricing and reliable delivery, we offer a wide range of products to meet all your heating needs.
