TWPro MB - Rotating Cowl - Ø 100
At a Glance
- Resolves down draft issues through efficient rotating mechanism
- Constructed with durable 304 and 316 stainless steel
- Suitable for wood, gas, oil, and low sulphur coal appliances
- HETAS approved and CE marked for safety and compliance
- Ensures a safe 50mm clearance from combustible materials

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 TWPro MB Rotating Cowl - Ø100mm is an essential addition to any chimney system, particularly if you're dealing with problems of down draft. Designed for use with solid fuel, gas, and oil appliances—including woodstoves, gas coal effect fires, oil boilers, and gas boilers—this rotating cowl ensures optimal performance by equalizing outlet velocity. Constructed with an outer skin of 304 stainless steel coated with a high-temperature black finish and an inner layer made of 316 grade stainless steel, it boasts a robust 0.4mm thickness.
The insulation is top-notch, utilizing compressed rockwool with a density of 200kg/m3. Fully welded parts ensure durability and a secure fit, maintaining a safe 50mm distance from combustibles. This product is HETAS approved and CE marked, with designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.
The installation process is straightforward, employing a Locking Band (supplied) to secure parts together, ensuring a flawless setup.
SKU: 37-100-094
Technical Specifications | |
---|---|
Model | TWPro MB Rotating Cowl - u00d8 100 |
Material | Outer: 304 Stainless Steel (High Temperature Black Coated), Inner: 316 Stainless Steel |
Thickness | 0.40mm |
Insulation | Compressed Rockwool, 200kg/m3 |
Fuel Compatibility | Wood, Oil, Gas, Low sulphur coal |
Approvals | HETAS / CE |
Designation | EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 P1 W V2 L50040 O20 |
Minimum Clearance | 50mm from combustibles |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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 TWPro MB Rotating Cowl - Ø100mm is an exceptional product, providing unparalleled protection against down draft in your chimney system. It's versatile for various fuel types and backed by reliable nationwide delivery. National Flues serves both retail and trade customers, and our prices are hard to beat!
The TWPro MB Rotating Cowl is designed to address down draft issues in chimney systems, ensuring efficient airflow for various fuel appliances.
TWPro is renowned for its robust and reliable chimney components, expertly crafted to enhance chimney performance for residential and commercial systems.
