IL - Adjustable Length - 457mm (18in) - Ø 150
At a Glance
- Robust twin wall construction with aluminium liner and zalutite outer case
- Adjustable length (457mm/18in) designed for natural aspiration
- Suitable for domestic gas-fired appliances with a draught hood or diverter
- Available in multiple diameters (100mm, 125mm, and 150mm) for versatile installation
- 6mm air gap for optimal insulation and safety
- Proven performance for over 25 years in the UK

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 IL Adjustable Length Chimney Flue - 457mm (18in) Ø 150 is a robust twin wall insulated pre-fabricated gas vent designed for naturally aspirated domestic gas-fired appliances, making it a perfect choice for various installations over the past 25 years in the UK. Crafted with an aluminium liner and a zalutite outer case, separated by a 6mm air gap, this flue excels in maintaining efficiency and safety. It is designed to function under negative pressure and dry conditions, ensuring the flue gas temperatures do not surpass 250°C.
Available in three diameter sizes (100mm, 125mm, and 150mm), this product is perfect for internal and external applications, providing flexibility and ease of installation. Not suitable for condensing and positive pressure applications, this gas vent is a dependable component for enhancing your heating system’s performance.
SKU: 24-150-16
Technical Specifications | |
---|---|
Product Type | Adjustable Length Chimney Flue |
Overall Length | 457mm (18in) |
Outer Diameter | u00d8 150 |
Inner Material | Aluminium |
Outer Material | Zalutite (zinc and aluminium coated steel) |
Air Gap | 6mm |
Maximum Flue Gas Temperature | 250u00b0C |
Application | Natural aspiration for domestic gas-fired appliances |
Suitable Diameters | 100mm, 125mm, 150mm |
Warranty | 5 year conditional warranty |
Joint Method | Push fit and twist lock |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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. If you find it cheaper within 48 hours, we'll refund the difference.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
The IL Adjustable Length Chimney Flue by National Flues is an exceptional choice for both retail and trade customers. With over 25 years of reliability and reputation in the UK, our products ensure quality and dependable performance. Available nationwide and rarely beaten on price, this flue system is a fantastic addition to any project.
The IL Adjustable Length Chimney Flue is designed to efficiently vent flue gases from naturally aspirated domestic gas-fired appliances.
National Flues is a trusted supplier of fireplaces and flues, serving both retail and trade customers nationwide. Known for our competitive pricing, reliable delivery, and quality products, we ensure that every customer receives the best in flue solutions.
