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National Flues presents the Twin Wall to Twin Wall Increaser Ø 80 - Ø 100, a robust and reliable solution designed to optimise your chimney system's performance. Ideal for a variety of heating appliances including wood stoves, oil and gas boilers, this product complies with EN1856-1 standards and is both HETAS approved and CE marked. Enhance your home’s efficiency with this premium flue accessory, engineered for durability and exceptional thermal performance.
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£56.49
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Premium dual stainless steel construction (304 outer, 316 inner)
Bridges diameters from Ø80 to Ø100 in 25mm increments
Suitable for wood stoves, gas, oil, and low sulphur coal appliances
Compressed rockwool insulation (200kg/m³) for enhanced thermal efficiency
HETAS approved and CE marked for reliable safety
Easy installation with a secure Locking Band
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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.
The Twin Wall to Twin Wall Increaser Ø 80 - Ø 100 is your ultimate solution for enhancing chimney performance for both solid fuel and gas/oil appliances. This high-quality increaser is perfect for wood stoves, gas coal effect fires, oil and gas boilers, and any other solid fuel appliances. Crafted with precision, the outer skin is made from 304 grade stainless steel at 0.4mm thickness, while the inner skin boasts 316 grade stainless steel, also at 0.4mm thickness.
To ensure outstanding insulation, we've used compressed rockwool with a density of 200kg/m3. All components are fully welded to guarantee durability and safety, maintaining a mandatory 50mm distance from combustibles. Approved by HETAS and CE marked, this increaser meets the highest safety standards (EN1856-1 T600 N1 W V2 L50040 G50; EN1856-1 T200 W V2 L50040 O20).
Installation is a breeze, secured effortlessly with a Locking Band. Enhance your flue system today with a product that doesn’t compromise on quality or safety.
SKU: 2-80-004
Technical Specifications
SKU
2-80-004
Dimensions
Diameters u00d880 to u00d8100, increasing in 25mm increments
Outer Material
304 Stainless Steel, 0.4mm thick
Inner Material
316 Stainless Steel, 0.4mm thick
Insulation
Compressed Rockwool, 200kg/mu00b3
Fuel Compatibility
Wood, Oil, Gas, Low Sulphur Coal
Approvals
HETAS, CE marked (EN1856-1 T600 N1 W V2 L50040 G50; EN1856-1 T200 W V2 L50040 O20)
Installation Distance
Minimum 50mm from combustibles
Fixing Method
Secured with a Locking Band
Before installing the Twin Wall to Twin Wall Increaser, ensure that all preparatory work is completed by a certified professional. Always maintain a minimum clearance of 50mm from any combustible material. Begin by aligning the increaser with the existing flue system; then secure each section using the provided Locking Band, ensuring a firm, leak-proof connection. Double-check all welded joints for integrity and compliance with manufacturer guidelines. If in doubt at any step, consult the detailed installation manual or contact a qualified installer to avoid compromising safety.
It is suitable for wood stoves, gas coal effect fires, oil and gas boilers, and any solid fuel appliances.
The outer skin is made of 304 grade stainless steel and the inner skin from 316 grade stainless steel, both at 0.4mm thickness.
Compressed rockwool with a density of 200kg/m3 is used for insulation.
It is secured using a Locking Band, ensuring a tight and safe connection.
Yes, it is HETAS approved and also CE marked, meeting EN1856-1 T600 N1 W V2 L50040 G50; EN1856-1 T200 W V2 L50040 O20 standards.
You should always maintain a 50mm distance from any combustible material such as wood or plasterboard.
The increaser bridges gaps between Ø 80 to Ø 100, increasing in 25mm increments.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Wednesday, April 30th.
If you need faster stove or fireplace delivery please give us a call.
We can often 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. Mi-Flex offers a lifetime guarantee.
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.
Read our review in our Twin Wall to Twin Wall Increaser Ø 80 - Ø 100 buyers guide
Comprehensive Buyers Guide for the Twin Wall to Twin Wall Increaser Ø 80 - Ø 100
When it comes to upgrading your chimney system, choosing the right accessory can significantly impact the overall safety and efficiency of your home heating. The Twin Wall to Twin Wall Increaser Ø 80 - Ø 100 from National Flues is designed to meet these demands, ensuring that your flue system performs optimally with every use.
Understanding the Product
The Twin Wall to Twin Wall Increaser is manufactured using high-quality stainless steel; the outer layer features 304 grade stainless steel, while the inner layer is constructed from 316 grade stainless steel. This dual construction not only guarantees excellent resistance to corrosion but also assures durability under various weather conditions. The inclusion of compressed rockwool insulation (with a density of 200kg/m³) further enhances the thermal efficiency of the product. Available in 25mm incremental steps, this increaser is perfect for bridging the gap between Ø80 and Ø100 flue diameters, delivering a seamless, secure connection.
Key Benefits and Features
Durable Materials: With robust construction from premium stainless steels, your investment is protected against wear, ensuring that the increaser lasts through years of service. The chosen materials are particularly beneficial for handling high-temperature environments, critical for both solid fuel and oil/gas appliances.
Enhanced Safety: Safety is paramount in any chimney installation. The product is designed to maintain a 50mm clearance from combustible materials, significantly reducing the risk of fire hazards. Moreover, HETAS approval and CE marking confirm that the increaser meets stringent safety standards, making it a reliable choice for both residential and commercial properties.
Versatile Performance: This increaser is not restricted to a single type of fuel. Whether you operate wood stoves, gas coal effect fires, or oil and gas boilers, the product adapts effortlessly to the varying demands of different heating appliances. Such versatility makes it an invaluable accessory within a comprehensive chimney system.
Installation Process
Installation is straightforward when undertaken by a qualified professional. The increaser utilizes a Locking Band mechanism which ensures that all sections are securely fastened together, reducing potential issues with misalignment or leaks. It is crucial to adhere to the manufacturer's installation guidelines to ensure that the product functions as intended. Always verify that there is a minimum 50mm separation from any combustible surfaces, as this clearance is critical to maintaining the safety performance of your system.
Step-by-Step Installation:
1. Preparation: Before beginning, ensure that the flue and the installation area are clean and free of debris. This initial step prevents obstructions that may compromise the system’s performance.
2. Alignment: Carefully align the increaser with your existing flue system. Precision at this stage is key to achieving a secure fit.
3. Securing: Use the Locking Band to secure the sections together. Double-check the integrity of each connection and look for any gaps or misalignments.
4. Final Inspection: Once installed, perform a thorough inspection of the entire setup. Verify the 50mm clearance and ensure that all welding joints are robust and compliant with safety standards.
Addressing Common Objections
Potential buyers often express concerns about installation complexities, compatibility with their current systems, and overall safety. Here are some key points to consider:
- Installation Concerns: While any chimney accessory installation should ideally be handled by a professional, the design of this increaser simplifies the process considerably. The included Locking Band makes it easier to achieve a secure and precise fit, even when retrofitting older systems.
- System Compatibility: Designed to work with both solid fuel and gas/oil appliances, this increaser’s adaptability means it can serve a wide range of flue systems. It has been rigorously tested to meet industry standards, ensuring reliability irrespective of the fuel type used.
- Safety Standards: Safety is at the forefront of our design philosophy. The product is HETAS approved and CE marked, reassuring users that it complies with essential European safety standards. This certification is a testament to the product’s reliability and the high-quality materials used in its manufacture.
Why Choose National Flues?
At National Flues, we pride ourselves on offering high-quality flue products that blend performance, safety, and ease of installation. The Twin Wall to Twin Wall Increaser Ø 80 - Ø 100 is a prime example of this commitment. By choosing this increaser, you are investing in a product that is designed to enhance the efficiency and safety of your heating appliance system. Our commitment to quality is matched by our dedication to providing excellent customer service and competitive pricing, ensuring that both retail and trade customers receive the best available solutions.
Final Considerations
When upgrading your chimney system, it is essential to select accessories that deliver on both performance and safety. The Twin Wall to Twin Wall Increaser Ø 80 - Ø 100 offers remarkable versatility, robust construction, and ease of installation, ensuring that your home or business enjoys a more efficient and secure flue system. We understand that investing in your property’s safety and efficiency is a significant decision. That’s why we encourage you to review all specifications carefully and consult with a qualified professional if needed.
Experience the high standard of performance with National Flues and take the first step towards a safer, more efficient chimney system. buy now or call 01670 206 999.
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