MediumTinderbox on Log Box, 5kW, ECODesign with up and out full height kit (137-MLG-TBOX-outside)
Ready for installation. A full external flue system that runs up the outside of a two storey building. Ideal when internal routing isn’t practical. No chimney required. Our experts offer 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 wood burning for reliable heating in your home or small space.
ECODesign approved ensuring top energy efficiency and environmental performance.
Engineered as an up and out full height kit ideal for external installations.
Robust package components tailored for seamless assembly and enduring performance.
Comes with a free design service to guide you through the installation process.
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 10th. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. 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. 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.
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]
- Info
- Specs
- Install
- FAQs
MediumTinderbox on Log Box with up and out full height kit Discover the MediumTinderbox on Log Box – a top-of-the-range, ECODesign approved wood burning stove, complete with an up and out full height kit. Engineered for external installations, this heating solution combines efficiency, style, and robust construction. Enjoy reliable, eco-friendly heating complemented by our free design service, ensuring your installation is flawless.
Perfect for homeowners seeking premium quality and exceptional performance.
Features & Benefits
Efficient Wood Burning
Delivers reliable, consistent heat to keep your space warm and cosy.
ECODesign Approved
Optimises energy efficiency while reducing environmental impact.
Up and Out Full Height Kit
Specially designed for external installations, ensuring a flawless finish.
Robust Package Components
Ensures ease of installation and long-lasting durability.
Free Design Service
Offers professional advice to integrate the stove seamlessly into your space.
SKU: 137-MLG-TBOX-outside
SKU | Product Name | Qty |
---|---|---|
37-125-005 | TWPro MB - Flat Adaptor - Ø 125 | 1 |
37-125-016 | TWPro MB - Adjustable Pipe 250-350mm - Ø 125 | 1 |
37-125-031 | TWPro MB - 45° Bend - Ø 125 | 1 |
37-125-010 | TWPro MB - Pipe 1000mm - Ø 125 | 7 |
37-125-034 | TWPro MB - 135° Tee - Ø 125 | 1 |
37-125-036 | TWPro MB - Tee Cap - Ø 125 | 1 |
37-125-011 | TWPro MB - Pipe 500mm - Ø 125 | 1 |
37-125-112 | TWPro MB - Rain Cap with Mesh - Ø 125 | 1 |
58-125-160 | TWPro MB - Retro Fit Base Support - Ø 125 | 1 |
58-125-052 | TWPro MB - Wall Support 80-130mm - Ø 125 | 3 |
15-125-100 | Wall Sleeve 45° Adjustable - Ø 125 | 1 |
58-125-114 | TWPro MB - MB Round Finishing Plate 45° (1 Piece) - Ø 125 | 1 |
58-125-097 | TWPro MB - Finishing Plate 30°-45° - Ø 125 | 1 |
37-125-012 | TWPro MB - Pipe 250mm - Ø 125 | 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 |