6" (150mm) 904 Dura Flue Flexi Chimney Liner

DURA FLUE Premium Class 1 Stainless Steel 316 Flexible Chimney Liner, to be used when re-lining a masonry chimney only - EN 1856-2 T600 N1 D V2 L50010 G, HETAS approved and CE marked. See technical documents for full specification and installation.

Dura Flue 904 is suitable for:

• Seasoned/Kiln/Dried wood
• HETAS approved Solid Fuels
• HETAS approved Smokeless Fuels (occasional use only)
• Gas appliances
• Oil Fired appliances

Important Fuel Usage Notice

Do not burn wood and smokeless fuel together. Combining these fuels can result in:

• Inefficient combustion
• Excessive tar and soot buildup
• Potential damage to your appliance or flue system
• Production of acidic condensates that accelerate corrosion

Wood and smokeless fuels require different burn conditions and air supply settings. When used together, they can create harmful byproducts that shorten the lifespan of your chimney or flue.

For safe and efficient operation, always burn one fuel type at a time and follow the appliance manufacturer's instructions.

Dura Flue is the only stainless steel flexible chimney liner on the UK market that can be fitted in either direction. This is due to the patented manufacturing process, this not only allows for multi directional use but also makes it extremely difficult for corrosion to set in unlike other traditional flexible flues. Dura Flue is made from 2 separate sheets of stainless steel:

The Outer: The outer skin of Dura Flue is a pre profiled ribbon of stainless steel, with deep, close together waves that create an extremely hard and protective exterior for the flue, like a shell. When your chimney liner is dragged down a brick flue it will undoubtedly be pulled and hit against the brick work, because the outer/shell is a separate sheet (and not 1 or 2 pieces folded together) it protects the smooth inner from damage. It also makes it less likely that the flue in general will be damaged or compromised before installation compared to other flues that are soft and can be damaged as easily as being knocked in the back of a van.

The Inner: The Inner skin of Dura Flue is a pre profiled ribbon of stainless steel, which has been made with a fine special oil spray to create a smooth inner surface. Unlike other flues our inner surface of steel has not been folded or scratched in production and has not been compromised in any way. It is locked to the outer skin purely with pressure using a patented technique. This means that Dura Flue essentially has a fresh uncompromised inner surface for the flue gasses to pass through making it almost impossible for corrosion to set in.

There are no internal flaps, folds or lips on the inside of Dura Flue it is the only chimney liner on the UK market to have this unique feature. Traditional flue liners with multi directional arrows and flaps/folds inside damage easily, can come apart on installation and could splay or come apart internally once fitted, which you will not normally see unless your installer or chimney sweep does a camera inspection for you.

Dura Flue will come wrapped in shrink wrap clearly marked 316 or 904, we apply black tape of the ends of the flue for 316 and white tape for 904. Please make sure you fill out a warranty form for every installation. As we make all our chimney liners to order you’ll never have to buy a longer length than you need, we make every single liner for you the diameter and length you need it there and then, order online, call in and collect or arrange a same day or next day delivery with us, nothing is a problem.

• HETAS approved and CE marked;
• Constant burning temperature of T600 and maximum T1000;
• 30 Year Warranty (No quibble);
• Can be fitted either way up;
• No folds or flaps on the inside;
• Extremely tough and strong;
• Smooth inner;
• Protective outer;
• Flexible and Durable;
• Premium flue and quality assured.