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Wall Sleeve 45° Adjustable - Ø 100 (15-100-100)
Discover National Flues' Wall Sleeve 45° Adjustable Ø 100mm – the ultimate solution for safeguarding your chimney flue. Engineered in high-quality stainless steel, this product is perfect for installations involving wood stoves, gas, oil, or coal-effect fires. With HETAS and CE approvals, it stands as a reliable and safe choice for any chimney system, ensuring efficient thermal protection and compliance with UK safety standards.
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In Stock
£24.49
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Durable dual-layer construction: Outer 304 stainless steel and inner 316 stainless steel, each 0.4mm thick
Pre-cut 45° design allowing manual adjustment for tailored installation
Complies with HETAS and CE standards, ensuring safety and reliability
Secured safe distance to combustibles (TWPro 50mm / KC 60mm)
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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 Wall Sleeve 45° Adjustable (Ø 100mm) is specifically engineered to ensure the safe passage of your chimney flue through external walls. Ideal for use with solid fuel and gas/oil appliances such as woodstoves, gas coal-effect fires, as well as oil and gas boilers, this robust sleeve is built to last. Constructed with an outer skin of 304-grade stainless steel and an inner skin of 316-grade stainless steel, each with a 0.4mm thickness, it offers exceptional durability.
Additionally, the sleeve includes compressed rockwool insulation with a density of 200kg/m3 TWPro / 128Kg/m3 for top-notch thermal protection. Designed for convenience, the pre-cut 45° angle of the sleeve can be manually adjusted to fit your specific installation needs, and the gap between the flue and sleeve can be filled with rockwool for added security. The product also ensures a safe distance from combustible materials, meeting all HETAS and CE approval standards.
• Ensure the wall sleeve is installed by a qualified professional following manufacturer guidelines
• Adjust the pre-cut 45° angle to align perfectly with the wall opening, minimising the gap between the flue and sleeve
• Fill the gap with high-density rockwool insulation for enhanced thermal protection and safety
• Maintain required safe distances from combustible materials (TWPro: 50mm / KC: 60mm) as per product specifications
• Regularly inspect the installation to confirm that all components remain securely in position
• When in doubt, reference the installation manual or consult our support team to prevent any potential installation issues
This sleeve is suitable for use with solid fuel and gas/oil appliances, including woodstoves, gas coal-effect fires, oil boilers, and gas boilers.
The sleeve features an outer skin made of 304-grade stainless steel and an inner skin made of 316-grade stainless steel, both 0.4mm thick. It is also insulated with compressed rockwool.
The 45° angle sleeve can be manually extended within the wall, making it highly adaptable to various installation requirements.
Yes, the TWPro Wall Sleeve 45° Adjustable is HETAS approved and CE marked, ensuring it meets the highest safety standards.
The safe distance to combustibles is 50mm for TWPro and 60mm for KC, as specified in the product's guidelines.
TWPro Twin Wall Insulated Chimney parts are secured together using a Locking Band, ensuring a stable and secure installation.
Yes, the gap can be filled with rockwool for additional insulation and safety.
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.
Comprehensive Buyers Guide for the Wall Sleeve 45° Adjustable Ø 100mm
When planning your chimney installation, choosing the right components is essential to ensure safety, compliance, and longevity. The Wall Sleeve 45° Adjustable Ø 100mm from National Flues offers a superb balance of quality, precision engineering, and affordability.
Understanding the Product
The Wall Sleeve is designed to protect chimney flues as they pass through external walls. This vital component is constructed with two layers of premium stainless steel – a 304-grade outer skin and a 316-grade inner skin, each with a thickness of 0.4mm. This design not only ensures durability and resistance against the elements but also provides the necessary structural integrity during the installation process. The pre-cut 45° angle facilitates easy, manual adjustment, allowing the product to be perfectly aligned with the wall opening, regardless of slight variations in wall dimensions.
Key Benefits for Your Home
Superior Thermal Insulation: The integration of compressed rockwool insulation (at densities of 200kg/m3 for TWPro and 128kg/m3 for KC) significantly enhances the thermal protection of your installation. This means reduced heat loss and improved efficiency for your heating system.
Enhanced Safety: With HETAS and CE certifications, this product meets rigorous safety standards. The precise construction of the Wall Sleeve ensures that the flue maintains the necessary clearances from combustible materials (TWPro: 50mm / KC: 60mm), thereby mitigating fire risks.
Tailored Installation: The adjustable 45° design allows installers to manually extend or retract the sleeve as required, ensuring a perfect fit in various wall configurations. This adaptability makes it easier to accommodate additional accessories such as sealing bands, support brackets, and insulation fillers, which you might wish to explore for a complete installation package.
Installation Considerations
Proper installation is critical to achieving both safety and performance. The Wall Sleeve must be installed by a qualified professional to ensure that it is securely integrated into your chimney system. Special attention should be paid to:
• Aligning the 45° angle correctly with the wall opening.
• Filling the gap between the sleeve and the flue meticulously with high-quality rockwool insulation.
• Verifying that the installation maintains the necessary safe distances from combustible materials.
These points are not just formalities—they are essential steps that contribute to the overall safety and efficiency of your heating solution. Should you decide to enhance your setup, remember to search for additional accessories such as flue support brackets, sealing components, and chimney caps to complement your Wall Sleeve and ensure a fully optimised chimney system.
Addressing Common Concerns
Worried About Durability? The choice of high-grade stainless steel means that our Wall Sleeve is built to last. This robust construction withstands adverse weather conditions, reducing maintenance costs in the long run.
Installation Flexibility: The adjustable design ensures that even if your wall dimensions are not standard, the Wall Sleeve can be adapted for a perfect fit. This versatility is a standout feature, mitigating the stress often associated with custom installations.
Is It Safe? Absolutely. With certifications from HETAS and CE, rest assured that this product complies with all necessary safety regulations. The embedded clearances for combustible materials further reinforce its safety profile.
Maximising Your Purchase
For the best results, consider exploring additional accessories that enhance the performance and appearance of your chimney. Accessories such as insulation fillers, enhanced sealing options, and support brackets can be invaluable in creating a robust and fully compliant installation. National Flues offers a range of such supplementary products to complement your Wall Sleeve perfectly.
By choosing the Wall Sleeve 45° Adjustable Ø 100mm from National Flues, you are not only opting for a high-quality product but also ensuring that your home is equipped with components that meet stringent safety and performance standards. This detailed understanding should help you rationalise the potential benefits and answer any lingering questions about the installation process and overall product durability.
Final Thoughts
Invest in safety and efficiency with National Flues. With its robust construction, adjustable design, and top-notch insulation, the Wall Sleeve 45° Adjustable Ø 100mm is engineered to deliver peace of mind. If you have any further questions or require additional accessories for a comprehensive installation, our dedicated support team is here to assist you every step of the way.
Add to cart or call 01670 206 999.
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