Free Delivery over £100+ 5on Trustpilot Browse our popular stoves Fast Mainland UK Delivery Buy stoves with install packs Call 01670 206 999 for help

TWPro MB - Rotating Cowl - Ø 150 (37-150-094)

National Flues proudly presents the TWPro MB Rotating Cowl - Ø 150, a leading-edge solution for maximising chimney efficiency. Engineered from premium stainless steel materials and incorporating an innovative rotating design to counter down drafts, this product is optimised for modern fireplaces and flues. Read more...
TWPro MB - Rotating Cowl - Ø 150
IN STOCK
Product Thumbnail
Now only £221.99
including free delivery Give us a call if you find it cheaper and we'll normally price match.
  • Fast deliveryMonday, November 17th*
  • Best PriceCall us to beat any price you found online.
  • Secure checkoutCard· Google/Apple Pay· Klarna· Paypal

 

Payment Options

At a Glance

  • Versatile performance for solid fuel, gas, and oil appliances
  • Constructed with a 304 stainless steel outer layer (high temperature black coated) and a 316 grade stainless steel inner layer
  • Rotating cover design that effectively reduces chimney down drafts
  • Fully welded structure providing robust and long-lasting durability
  • Dense, compressed rockwool insulation (200kg/m³) for optimal thermal efficiency
  • Safe installation with a mandatory 50mm clearance from combustibles
  • Approved to HETAS and CE standards, ensuring industry-compliant 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: sales@nationalflues.com

The TWPro MB Rotating Cowl - Ø 150 is meticulously designed to handle the complexities of modern chimney systems. Suitable for solid fuel, gas, and oil appliances—including woodstoves, gas coal effect fires, oil boilers, and gas boilers—this cowl brings versatility and reliability. Constructed with a 304 stainless steel outer skin, coated with a high-temperature black finish, and a robust 316 grade stainless steel inner skin, it promises longevity and superior performance.

The insulation consists of dense, compressed rockwool (200kg/m3) ensuring optimal thermal protection. This cowl maintains a safe distance of 50mm from any combustible materials and is fully welded for strength. Approved by HETAS and CE marked, this product meets industry standards with designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.

Installation is a breeze with the supplied Locking Band, which secures the twin wall insulated chimney parts seamlessly.

SKU: 37-150-094

Delivery Information* +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.

About National Flues Ltd +

We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.

This is us — real advice over the phone, or at the counter, and real stock in our warehouse.

Customer being served at the National Flues trade counter
Trade counter Installer collection & same-day help.
Team helping customers at the counter
Advice Real people on the phone to spec the right parts.
Friendly member of the team at the front desk
Here to help Friendly, straight answers from HETAS approved experts.
Warehouse shelves with boxed flue components being picked for dispatch
Warehouse Orders picked & dispatched nationwide.
Talk to the team Visit our trade counter
Technical Specifications
SKU37-150-094
Product NameTWPro MB - Rotating Cowl - Ø 150
DesignationsEN1856-1 T600 N1 W V2 L50040 G50 | EN1856-1 T200 P1 W V2 L50040 O20
Outer Material304 Stainless Steel with High Temperature Black Coating
Inner Material316 Stainless Steel
InsulationDense, compressed rockwool (200kg/m³)
Fuels SuitableWood, Oil, Gas, Low sulphur coal
Clearance To Combustibles50mm
ApprovalsHETAS, CE Mark
InstallationIncludes a Locking Band for secure assembly
FinishHigh temperature black finish
Installation of the TWPro MB Rotating Cowl is straightforward and designed with the user in mind. Begin by ensuring that the chimney system has a clearance of at least 50mm from any combustible materials. The product comes with a Locking Band that securely joins the twin wall insulated chimney sections, simplifying the assembly process. Before installation, verify that all components are in perfect condition and consider checking the optional accessories available such as chimney support brackets or custom liners for tailored setups. Always follow the manufacturer’s guidelines and local building regulations during installation. If uncertain or for complex installations, consult a professional installer to guarantee optimum performance and safety.

Yes, it is designed for use with solid fuel, gas, and oil appliances, making it highly versatile.

The outer layer is made from 304 stainless steel and coated with a high-temperature black finish. The inner layer is made from 316 grade stainless steel.

The rotating cover of the cowl spins with the wind, which helps equalize the outlet velocity and reduce down drafts.

The required distance to combustibles is 50mm to ensure safety.

Yes, the installation is easy with the provided Locking Band that secures the twin wall insulated chimney parts together.

Yes, this product is HETAS approved and CE marked, meeting industry standards.

The designation numbers are EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.

 

Call the Experts   8am-5pm
👀 5 people watching this