IL - Firestop Spacer - Ø 100
At a Glance
- Essential for maintaining safe clearance at floor or ceiling penetrations
- Constructed with an aluminium liner and zalutite outer case for durability
- Compatibility with naturally aspirated domestic gas-fired appliances
- Suitable for both internal and external installations
- Designed to handle flue gas temperatures up to 250°C
- Over 25 years of proven reliability in chimney safety

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 Firestop Spacer Ø 100 is an essential component for a safe and efficient chimney flue system. This twin wall insulated pre-fabricated domestic gas vent system has been a UK favourite for over 25 years. Known for its quality and reliability, it's designed for naturally aspirated domestic gas-fired appliances fitted with a draught hood or diverter.
The vent operates under negative pressure and in dry conditions, handling flue gas temperatures up to 250°C. Available in three diameter sizes: 100mm, 125mm, and 150mm, it features an aluminium liner and a zalutite outer case, separated by a 6mm air gap. Suitable for both internal and external installations, it is not built for condensing or positive pressure applications.
SKU: 24-100-54
Technical Specifications | |
---|---|
SKU | 24-100-54 |
Item | Firestop Spacer - u00d8 100 |
Designation | EN 1856-1 T250 N1 D Vm L11030 0(50) |
System | IL |
InnerMaterial | Aluminium |
OuterMaterial | Zalutite (coated steel with zinc and aluminium) |
Temperature | Up to 250u00b0C |
Approvals | CE, BS EN 9001:2008 |
DistanceToCombustibles | 50mm (2 Inches) |
Warranty | 5 year conditional warranty |
JointMethod | Push fit and twist lock |
DiameterOptions | 100mm, 125mm, 150mm |
SuitableApplications | Internal and external installations for naturally aspirated domestic gas-fired appliances with draught hood/diverter |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 4th. 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.
National Flues Ltd Verdict
The IL Firestop Spacer Ø 100 stands out with its unbeatable affordability and reliability. Trusted for over 25 years, it is perfect for your gas vent requirements. National Flues, rarely beaten on price, ensures you get high-quality products delivered nationwide. Ideal for both retail and trade customers.
The IL Firestop Spacer Ø 100 is designed to ensure safe clearance of combustible materials when penetrating floors or ceilings in a gas vent system.
National Flues is a leading supplier of fireplaces and flues across the UK. Known for reliability, quality, and competitive pricing, we cater to both retail and trade customers with nationwide delivery and secure online payment options.
