Sflue (2172705) - Ventilated Ceiling Support (Solid Fuel) - 127mm Ø
At a Glance
- HETAS Approved & CE Marked
- Robust construction with 304 & 316 grade stainless steel
- 0.40mm thick outer and inner skins for added durability
- Patented intumescent matrix for rapid fire and smoke sealing
- 8-barbed twist-lock mechanism for a secure connection
- Suitable for wood, oil, gas, and low sulphur coal appliances
- 15-year warranty ensuring long-term reliability

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 Sflue Ventilated Ceiling Support (2172705) is designed to support and firestop your chimney system as it passes through combustible floors above the appliance. It is suitable for a range of solid fuel and gas/oil appliances, including woodstoves, gas coal effect fires, oil, and gas boilers. Constructed with robust 304 grade stainless steel for the outer skin and 316 grade for the inner skin, both 0.4mm thick, this product guarantees longevity and durability.
The insulation, made from compressed rockwool with a density of 230kg/m3, ensures optimal performance and safety, encapsulated within the twist-lock couplers for a secure fit. The innovative design includes a patented intumescent matrix that quickly expands with temperature to seal the plate, preventing the spread of fire or smoke. The Sflue system's 8-barbed twist-lock mechanism ensures a dependable connection secured by a locking band, maintaining a safe 50mm distance from combustibles.
HETAS approved and CE marked, the Sflue Ventilated Ceiling Support meets the rigorous EN1856-1 T450 N1 D V2 L50040 G50 standards.
SKU: 22-125-078
Technical Specifications | |
---|---|
SKU | 22-125-078 |
Model | Sflue (2172705) |
Type | Ventilated Ceiling Support (Solid Fuel) |
Diameter | 127mm |
Outer Material | 304 Stainless Steel (0.40mm thick) |
Inner Material | 316 Stainless Steel (0.40mm thick) |
Insulation | Compressed Rockwool, 230kg/m3 |
Approval | HETAS / CE |
Standards | EN1856-1 T450 N1 D V2 L50040 G50 |
Distance To Combustibles | 50mm |
Warranty | 15 Years |
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.
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National Flues Ltd Verdict
The Sflue (2172705) Ventilated Ceiling Support is essential for anyone looking to ensure safe and efficient flue installations for solid fuel and gas/oil appliances. National Flues prides itself on reliable delivery and unbeatable prices for both trade and retail customers nationwide.
The Sflue Ventilated Ceiling Support is used to support and firestop the chimney system as it passes through the first combustible floor directly above the appliance, ensuring safety and efficiency.
Sflue is known for manufacturing high-quality chimney and flue components that meet rigorous safety standards, ensuring reliability and performance in various solid fuel and gas/oil appliance installations.
