Gas Cowl Ø 150
At a Glance
- Crafted from premium 304 stainless steel (outer) and 316 stainless steel (inner)
- Engineered for gas appliances including gas coal effect fires and oil/gas boilers
- High-density compressed rockwool insulation ensures thermal efficiency and fire safety
- HETAS approved and CE marked for superior safety standards
- Maintains a safe 50mm clearance from combustibles
- Easy installation with a secure locking band connecting TWPro Twin Wall Insulated Chimney parts

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 Gas Cowl Ø150 is specifically designed for use with gas appliances. Ideal for gas coal effect fires, oil and gas boilers, this cowl ensures optimal performance and safety. The outer skin features 304 grade stainless steel at 0.4mm thick, while the inner skin comprises 316 grade stainless steel, also at 0.4mm thick, for enhanced durability.
Insulated with high-density compressed rockwool (200kg/m3), the cowl maintains a safe distance of 50mm from combustibles, ensuring lower risks of fire hazards. Fully welded and rigorously tested, this product carries HETAS approval and CE marking, boasting the designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20. Installation is straightforward with the use of a locking band, designed to securely join TWPro Twin Wall Insulated Chimney parts.
Our Gas Cowl Ø150 combines premium construction with ease of use for your peace of mind.
SKU: 2-150-092
Technical Specifications | |
---|---|
Product Name | Gas Cowl u00d8 150 |
SKU | 2-150-092 |
Outer Material | 304 Grade Stainless Steel (0.40mm thick) |
Inner Material | 316 Grade Stainless Steel (0.40mm thick) |
Insulation | High-Density Compressed Rockwool (200kg/m3) |
Clearance | 50mm minimum from combustibles |
Approvals | HETAS / CE |
Designation Numbers | EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20 |
Compatible Appliances | Gas coal effect fires, Oil and Gas boilers |
Installation | Utilises locking band with TWPro Twin Wall Insulated Chimney parts |
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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
Our Gas Cowl Ø150 is a top-tier choice for enhancing your chimney's efficiency. It’s made from premium materials and meets rigorous standards. We proudly serve retail and trade customers across the UK with reliable delivery and competitive pricing.
The Gas Cowl Ø150 is used to improve the performance and safety of gas appliances by enhancing chimney ventilation and preventing downdraughts.
National Flues is a leading supplier of fireplaces and flues throughout the UK, known for unbeatable prices, reliable delivery, and a commitment to quality service for both retail and trade customers.
