MediumTinderbox on Log Box, 5kW, ECODesign with single storey extension kit (137-MLG-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 wood burning for reliable home heating.
EcoDesign approved with low emissions and high energy efficiency.
Ideal for compact spaces with a single storey extension kit design.
Easy installation process backed by our free design service.
Flexible flue options with 5' Top or Rear outlet.
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, 5kW, ECODesign :: with single storey extension kit :: with single... Introducing the MediumTinderbox on Log Box, a 5kW ECODesign stove that offers efficient, eco-friendly wood burning heating for your home. This single storey extension kit is perfect for compact living spaces, providing outstanding energy efficiency and a contemporary design that complements any interior.
With flexible flue options and robust construction, this stove is engineered for both comfort and performance. Benefitting from our free design service, you can tailor your installation to fit your unique space while enjoying reduced emissions and lower running costs.
Features & Benefits
Eco-Friendly Burning
Provides sustainable heating while reducing CO emissions significantly.
Compact & Versatile
Perfect for small spaces and single storey extensions, ensuring a snug fit in your home.
High Energy Efficiency
Achieves an A+ rating which results in lower running costs and a greener footprint.
Cleanburn and Airwash Systems
Ensures cleaner combustion and a reduction in soot build-up on the glass for an optimal view.
Flexible Installation
Multiple flue outlet options allow for adaptation to a variety of building layouts.
SKU: 137-MLG-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 |