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Explore the KC Twin Wall to Twin Wall Increaser - Ø 450 to Ø 500, a premium flue accessory. This HETAS approved, CE marked increaser is the ultimate choice for enhancing your chimney, whether you use wood, oil, gas, or low sulphur coal. Engineered for safety and durability, this stainless steel increaser is the perfect solution for both professional installers and homeowners seeking reliable performance. Embrace quality, efficiency, and superior design with this top-quality Dutch manufacturing flue connector.
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Out of Stock – Pre-order Now
£375.99
with free delivery
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
High quality stainless steel construction (304 outer, 316 inner)
Suitable for wood, oil, gas, and low sulphur coal appliances
HETAS approved and CE marked for safety
Precision engineered for Ø450 to Ø500 flue systems
Robust insulation with compressed rockwool (128kg/m³)
Secure, easy Locking Band installation
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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 KC Twin Wall to Twin Wall Increaser - Ø 450 to Ø 500 is designed for use with solid fuel and gas/oil appliances, including woodstoves, gas coal effect fires, and oil and gas boilers. Constructed with precision, the outer skin is made from 304 grade stainless steel (0.4mm thick), and the inner skin is made from 316 grade stainless steel (0.5mm thick). The insulation consists of compressed rockwool with a density of 128kg/m³, ensuring optimal thermal efficiency.
All parts are fully welded for robustness. Approvals include HETAS certification and CE marking, meeting designation numbers EN1856-1 T600 N1 W V2 L50040 G90 for high-temperature applications, and EN1856-1 T200 P1 W V2 L50040 015 for low-temperature applications. For installation, all KC Twin Wall Insulated Chimney parts connect securely using a Locking Band.
Maintain a safe distance of 90mm from combustibles for biomass and 15mm for low-temperature gas and oil.
SKU: 60-450-004
Technical Specifications
Outer Material
304 Stainless Steel (0.4mm thick)
Inner Material
316 Stainless Steel (0.5mm thick)
Insulation
Compressed Rockwool (128kg/mu00b3)
Approvals
HETAS / CE
Designation High Temp
EN1856-1 T600 N1 W V2 L50040 G90
Designation Low Temp
EN1856-1 T200 P1 W V2 L50040 015
Flue Diameter
u00d8450 to u00d8500
Warranty
12 Years
Compatible Fuels
Wood, Oil, Gas, Low sulphur coal
KC Twin Wall Insulated Chimney parts are designed to connect securely using a Locking Band system. For safe installation, ensure that you maintain a clearance of 90mm from combustibles for biomass appliances and 15mm for low-temperature gas and oil appliances. Always follow the manufacturer’s guidelines and consider professional installation if you are unsure.
Yes, the KC Twin Wall to Twin Wall Increaser is suitable for use with solid fuel, gas, and oil appliances, including woodstoves, gas coal effect fires, and oil and gas boilers.
The outer skin is made from 304 grade stainless steel (0.4mm thick), while the inner skin is made from 316 grade stainless steel (0.5mm thick). The insulation is composed of compressed rockwool with a density of 128kg/m³.
Yes, the KC Twin Wall to Twin Wall Increaser is HETAS approved and also CE marked.
For biomass appliances, maintain a distance of 90mm from combustibles. For low-temperature gas and oil appliances, a distance of 15mm is recommended.
The designation numbers are EN1856-1 T600 N1 W V2 L50040 G90 for high-temperature applications and EN1856-1 T200 P1 W V2 L50040 015 for low-temperature applications.
KC Twin Wall Insulated Chimney parts are secured using a Locking Band. Simply attach the Locking Band to ensure a firm and safe connection.
Yes, our products typically come with a manufacturer’s warranty. Please refer to the specific product details or contact us if you have any questions.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Tuesday, May 6th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call.
If you need faster stove or fireplace delivery please also 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. 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.
When it comes to upgrading your chimney installation, selecting the right components is paramount. The KC Twin Wall to Twin Wall Increaser - Ø 450 to Ø 500 is a top-quality solution engineered for both safety and performance. This comprehensive guide will help you understand the benefits, technical aspects, and installation guidelines associated with this product, ensuring you can make a well-informed purchase.
Understanding the Product
The KC Twin Wall to Twin Wall Increaser is designed for use with a range of fuel appliances including woodstoves, gas coal effect fires, oil, and gas boilers. Its robust construction using high-quality stainless steels (304 for the outer skin and 316 for the inner skin) ensures excellent durability. The compressed rockwool insulation further enhances thermal efficiency, facilitating a secure and effective connection between flue sections. The product’s design complies with EN1856-1 standards, underscoring its capability to perform under high-temperature applications as well as low-temperature settings.
Key Features and Their Benefits
- Durability and Safety: The use of 304 and 316 stainless steel guarantees a product that stands up to the demanding conditions of chimney operations. This not only extends the lifespan of your installation but also improves safety by reducing the likelihood of material failure.
- Thermal Efficiency: The inclusion of compressed rockwool insulation (density of 128kg/m³) helps maintain optimal thermal performance. This reduces heat loss, ensuring your appliance operates efficiently while mitigating the risk of overheating.
- Versatile Fuel Compatibility: Whether your appliance runs on wood, oil, gas, or low sulphur coal, this increaser is built to cater for all. This versatility makes it an ideal addition for homes with varied heating systems.
- HETAS and CE Approvals: These certifications provide assurance that the product adheres to industry safety standards and regulations. This quality guarantee means that you can install the increaser with confidence.
- Easy Installation: The innovative Locking Band system allows for a secure and hassle-free connection between chimney components. This not only simplifies the installation process but also ensures a tight, leak-free system.
Technical Specifications and What They Mean
Technical details can often seem overwhelming, but they are vital to understanding product performance. In this increaser:
- Outer and Inner Materials: The outer skin is made from 304 stainless steel (0.4mm thick), while the inner skin is constructed from 316 stainless steel (0.5mm thick), providing enhanced strength and corrosion resistance.
- Insulation Quality: The use of compressed rockwool with a density of 128kg/m³ assists in heat retention and energy efficiency.
- Approval Standards: HETAS and CE markings ensure that the increaser meets rigorous safety standards. The high-temperature designation (EN1856-1 T600 N1 W V2 L50040 G90) and low-temperature designation (EN1856-1 T200 P1 W V2 L50040 015) reflect its reliability under various operating conditions.
- Flue Diameter Compatibility: Specifically designed to work with Ø450 to Ø500 systems, this increaser provides a secure and energy-efficient transition between flue sizes.
Installation Guidelines
Proper installation is crucial to harness the full benefits of your chimney system. Here are some essential tips:
1. Secure Connections: Always use the Locking Band to connect each section of the insulated chimney. This guarantees a firm bond and prevents disconnection.
2. Maintain Clearance: For biomass appliances, a clearance of 90mm from any combustible material is required. For low-temperature gas and oil appliances, ensure a clearance of 15mm. These safety distances are non-negotiable and help to prevent potential hazards.
3. Professional Advice: If you are unfamiliar with chimney systems, seeking professional installation is advisable. A certified installer can ensure that all connections are secure and compliant with current safety standards.
4. Regular Inspections: Even after installation, periodic inspections can help maintain the integrity of the system. Look out for any signs of wear or material degradation and act promptly.
Addressing Common Objections
Is the product compatible with my appliance?
Absolutely. The KC Twin Wall Increaser is designed to work with various appliances, including woodstoves, gas, and oil boilers. Its versatile design caters to a wide range of fuel types, ensuring compatibility across different setups.
Will this increaser meet safety standards?
Yes, with HETAS and CE approvals, this increaser meets or exceeds the rigorous safety requirements essential for chimney systems. Its compliance with EN1856-1 standards further confirms its robust performance in both high and low temperature scenarios.
How difficult is the installation process?
The product has been designed with ease of installation in mind. The Locking Band system provides a straightforward method to secure connections, making it suitable even for installer DIY projects. For those less familiar with chimney installations, professional help is available, ensuring that the process remains hassle-free and safe.
Final Thoughts and Making Your Choice
The KC Twin Wall to Twin Wall Increaser - Ø 450 to Ø 500 represents a blend of advanced engineering, strict adherence to safety standards, and user-friendly installation. When investing in a chimney system, it is important to consider not only the initial cost but also the long-term benefits of durability, efficiency, and reliability. By choosing this increaser, you are securing a component that has been thoughtfully designed to deliver optimum performance whether you rely on wood, oil, gas, or low sulphur coal.
Enhanced by quality materials and innovative design, this product offers a practical solution for homeowners and professionals alike. Its ability to maintain high thermal efficiency while ensuring a safe installation makes it a standout choice in the market.
With robust construction, versatility in fuel compatibility, and simple yet secure installation procedures, the KC Twin Wall Increaser provides value well beyond its cost. Investing in this product means investing in peace of mind and long-term operational reliability—a crucial consideration for any chimney installation.
Ready to experience a significant upgrade to your chimney system? Add to cart or call 01670 206 999.
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