Vaillant vertical roof flue Ø 110/160 mm, red, extension 1.5 m above roof

Product detailed description

Vaillant vertical roof flue Ø 110/160 mm – red version, long extension

This part is the terminal element of the Vaillant concentric flue gas exhaust system, which terminates directly above the roof covering. The extension protrudes approximately 1.5 m above the roof level and a further 0.5 m extends below the roof structure, making it a solution for buildings where the flue gas outlet needs to be raised sufficiently high above surrounding obstacles (parapets, rooftop equipment, neighbouring buildings) – typically for larger boiler rooms in apartment buildings, industrial halls or office buildings. The bold red colour is not just an aesthetic choice – on flat roofs of industrial and larger buildings it serves as a visual warning of an active flue gas outlet (for example for safety reasons when maintenance staff are moving around the roof or during crane operations) and is an alternative to the standard black version of the same part.

The part is part of a modular Ø 110/160 mm flue system kit and connects at the bottom to extension pipes, elbows or directly to the boiler/manifold via a bayonet lock with a seal. Due to its considerable length and weight (a full-size assembly including the roof passage and stabilising elements), the part is delivered as heavier, bulkier goods.

Summary of technical parameters

• Part type: Vertical roof flue (terminal extension)
• System diameter: Ø 110/160 mm (concentric)
• Outer shell colour: Red
• Length above roof: approx. 1.5 m
• Length below roof: approx. 0.5 m
• Total part length: approx. 2.0 m
• Inner pipe material (flue gas): Polypropylene (PP), condensate resistance class W
• Outer shell material (air): UV stabilised plastic
• Temperature class: T120
• Pressure class: P1
• Joint type: Bayonet lock with rubber seal
• Intended for: ecoTEC plus VU 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv, cascade systems
• Country of origin: Germany / EU (manufactured within the Vaillant Group)
• Brand: Vaillant
• Warranty: 24 months

Vaillant Ø 110/160 mm flue gas exhaust system

The pipe system with a diameter of Ø 110/160 mm belongs to the family of Vaillant concentric (coaxial) flue exhaust systems designed for high-capacity gas condensing boilers with higher rated output – typically the ecoTEC plus VU 806/5-5, 1006/5-5 and 1206/5-5 range (output range approx. 80–120 kW), the modular ecoCRAFT exclusiv and ecoVIT exclusiv systems, as well as cascade connections of multiple boilers to a common flue manifold. The inner pipe carrying the flue gases is made of durable polypropylene (PP) with high thermal and chemical resistance to condensate (condensate resistance class W according to EN 14471), while the outer shell that supplies combustion air is made of UV-stabilised plastic or aluminium depending on the specific part. The system is certified for temperature class T120, pressure class P1 (positive pressure system, suitable for condensing boilers) and corrosion resistance class 1, which corresponds to the normal operating range of flue gases from condensing boilers (low-temperature flue gases, acidic condensates).

The Ø 110/160 mm system is installed exclusively from original Vaillant parts – the individual components (extensions, elbows, inspection pieces, roof terminals and mounting elements) are combined into an assembly exactly according to the layout of the specific boiler room or plant room. All joints are sealed with a silicone seal using a locking (bayonet) system, which guarantees gas-tightness even over longer pipe runs and allows easy installation and disassembly without the need for gluing or welding.

Comparison with other diameters of Vaillant flue systems

Vaillant offers concentric flue exhaust systems in several diameters depending on boiler output – the smallest common diameter Ø 60/100 mm is used for most wall-hung condensing boilers for houses and apartments (ecoTEC pro/plus range up to approx. 35–65 kW), diameter Ø 80/125 mm is used for boilers with higher output or for longer runs where lower pressure loss is required. Diameter Ø 110/160 mm, which this part also belongs to, is intended for the highest common output segment (ecoTEC plus 806/5-5 – 1206/5-5, ecoCRAFT exclusiv, ecoVIT exclusiv) and cascade systems, where a substantially larger volume of flue gases needs to be discharged. Parts of different diameters are not interchangeable with each other – it is therefore always necessary to verify the exact system diameter on your boiler or in the project documentation before ordering.

Compatibility with boiler models

This particular extension, with an increased height of 1.5 m above the roof, is intended primarily for installations where a standard short roof terminal (usually approx. 0.5–1 m above the roof) is not sufficient – for example flat roofs with operating equipment (ventilation, photovoltaics), roofs with neighbouring taller buildings near the flue outlet, or a requirement from the investor/designer for an increased outlet for safety or aesthetic reasons. It is used in combination with the entire Ø 110/160 mm range – higher output ecoTEC plus boilers (806/5-5, 1006/5-5, 1206/5-5), modular boiler plants ecoCRAFT exclusiv and ecoVIT exclusiv, as well as in cascade connections of multiple boilers to a common flue manifold, where a single central outlet carries the flue gases from the entire cascade.

Typical application scenarios

This part is most often ordered for projects involving plant rooms on the flat roof of an apartment building or office building, where the technical room with boilers is located directly under the roof and the flue run is short, but due to surrounding obstacles (air conditioning units, solar panels, taller neighbouring buildings) the flue gas outlet still needs to be raised noticeably higher above the roof plane than a standard short terminal provides. The red version is often chosen deliberately in such cases so that the flue gas outlet is instantly recognisable from ordinary ventilation ductwork when maintenance staff move around the roof.

A second common scenario is replacing a damaged roof terminal during the renovation of an older boiler room, where the investor also addresses the previously insufficient outlet height in order to comply with current clearance distances from windows or ventilation openings of neighbouring buildings.

How to choose the right roof terminal variant

When choosing a roof terminal, consider primarily the actual height you need to achieve above the roof plane – this variant, approximately 1.5 m long above the roof, is intended for situations with increased requirements for outlet height (flat roofs with equipment, nearby taller buildings, a requirement for increased safety clearances). If your installation has no such restrictions, shorter and cheaper variants of the roof terminal in the same diameter are also available. The colour version (red versus black) is chosen by the investor or designer according to the building's visual requirements – functionally both variants are equivalent.

Installation

The vertical roof flue is installed at the very end of the flue gas exhaust run, after passing through the roof structure. The 0.5 m section remains below the roof and connects to the previous section of pipe (extension or elbow) in the attic or technical space, while the approximately 1.5 m section protrudes outside through the roof covering. During installation it is necessary to:

• ensure sufficient slope and drainage of rainwater around the roof passage (a separate part, usually with a lead or rubber collar depending on the type of roof covering),
• stabilise the pipe along its entire length with mounting clamps or brackets so that no sagging or excessive stress on the joints occurs due to wind,
• maintain the minimum outlet height above the roof according to applicable legislation (STN EN 15287, or local building regulations) and clearance distances from windows, ventilation openings and property boundaries,
• check the gas-tightness of each bayonet joint after insertion – correct insertion is noticeable by feel and the joint should not be able to be pulled apart without considerable force.

For greater heights above the roof (such as this 1.5 m variant), it is recommended to add anchoring with a steel cable or a special stabilising set, especially in windy locations and on taller buildings, where the part is exposed to greater wind load.

Safety warnings

Installation and connection of the condensing boiler's flue gas exhaust system may only be carried out by an authorised and trained installation company with the relevant professional qualification for gas appliances. An incorrectly assembled or leaking flue gas exhaust run can lead to flue gas leakage (including carbon monoxide) into living spaces, which represents a serious health risk. Use only original Vaillant parts of the appropriate diameter and certification – combining with parts from other manufacturers or of other diameters is not permitted and is contrary to the CE certification conditions of the entire assembly as well as the boiler warranty. After any intervention on the flue run (part replacement, servicing, inspection), a tightness check must be carried out before putting the boiler back into operation.

Maintenance and care

We recommend having the flue exhaust system checked at least once a year during the regular boiler service – especially the tightness of the joints, the patency of the condensate drain (if part of the assembly) and the mechanical fastening along the entire run. The outer plastic parts (roof terminals, passages) should be visually inspected after the winter season for possible mechanical damage caused by ice or wind. Under normal operation, the inside of the pipes does not accumulate deposits in the way that traditional solid-fuel chimneys do, but the inspection elements included in the assembly (inspection elbows, inspection pieces, T-pieces) exist precisely so that a service technician can easily look inside the pipe during inspection and clean it if necessary, without having to dismantle the entire run.

For boilers with a longer flue run, we recommend keeping a simple service record of the date of the last tightness check and the condition of the inspection openings – this makes it easier to plan future chimney inspections and provides an overview in case of a warranty claim or property sale.

Why buy this part from Atria.sk

We offer exclusively original Vaillant parts with 100% compatibility with this brand's flue exhaust systems – no universal replacements of questionable quality that could compromise the gas-tightness of the entire assembly or void the boiler warranty. The goods are usually in stock or quickly available from the supplier, so the completion of a boiler room installation or a service intervention is not delayed by one missing part. If you are unsure which exact part you need for your assembly, we are happy to advise by phone or email – just let us know the boiler model and the length of the flue run you need to cover.

We normally process orders within one business day and ship items in stock straight away. If you are not sure which exact part your project requires (for example when combining several lengths and elbows into one run), we are happy to help you choose the correct assembly before ordering – just send us a floor plan or a photo of the installation location together with the boiler model.

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