Twin Wall to Twin Wall Increaser Ø 200 - Ø 250 (2-200-004)
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Fast deliveryMonday, November 17th*
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Best PriceCall us to beat any price you found online.
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At a Glance
- Safely increases flue diameter from Ø200 to Ø250 mm
- HETAS approved and CE-marked
- Durable stainless steel construction (304 outer, 316L inner)
- High-density compressed rockwool insulation (200kg/m³)
- Suitable for solid fuel, oil, and gas appliances
- Easy installation with a secure Locking Band
Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.
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: sales@nationalflues.com
- Details
- Specs
- Install/Packs
- FAQs
The Twin Wall to Twin Wall Increaser (Ø 200 - Ø 250) is a premium quality component designed to safely and effectively increase the diameter of your chimney flue system. Suitable for use with solid fuel, gas, and oil appliances, this increaser can enhance the performance of woodstoves, gas coal effect fires, oil and gas boilers, and other solid fuel units. Constructed with a robust 304-grade stainless steel outer skin and a 316-grade stainless steel inner skin, both 0.4mm thick, this component ensures durability and resilience.
The insulation comprises high-density compressed rockwool (200kg/m3), providing excellent thermal protection. All parts are fully welded for superior strength. With a 50mm clearance from combustibles, you can rest assured that your installation is both safe and compliant.
The TWPro system is HETAS-approved and CE-marked, adhering to EN1856-1 standards. Installation is a breeze with the use of a Locking Band to secure the parts together.
SKU: 2-200-004
Delivery Information* +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.
About National Flues Ltd +
We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| Technical Specifications | |
|---|---|
| Flue Diameter | Increases from Ø200 mm to Ø250 mm |
| Inner Material | 316L Stainless Steel, 0.40mm thick |
| Outer Material | 304 Stainless Steel, 0.40mm thick |
| Insulation | High-density compressed rockwool (200kg/m³) |
| Compliance | HETAS approved, CE marked, compliant with EN1856-1 |
| Clearance | 50mm from combustible materials |
| System | TWPro |
| Installation | Secured using a Locking Band |