Twin Wall to Twin Wall Increaser Ø 200 - Ø 250 (2-200-004)
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
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. 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.
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: [email protected]
- Info
- Specs
- Install
- 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
| Technical Specifications | |
|---|---|
| Flue Diameter | Increases from u00d8200 mm to u00d8250 mm |
| Inner Material | 316L Stainless Steel, 0.40mm thick |
| Outer Material | 304 Stainless Steel, 0.40mm thick |
| Insulation | High-density compressed rockwool (200kg/mu00b3) |
| Compliance | HETAS approved, CE marked, compliant with EN1856-1 |
| Clearance | 50mm from combustible materials |
| System | TWPro |
| Installation | Secured using a Locking Band |
