Vaillant flue elbow 87°, red

Product detailed description

Vaillant vertical roof flue, red – complete flue gas routing above a roof with red roofing

The vertical roof flue in red (code 0020220657) is a complete flue gas path extension that ensures the final routing and discharge of flue gases from a Vaillant condensing boiler above the level of a pitched roof in a vertical flue gas path solution. It is a follow-up component to the roof flashing, continuing from the point of penetration through the roofing upward, and at a safe height of approximately 1.5 m above the roof safely discharges the flue gases into the surrounding air. The red version is intended primarily for roofs with red, brick, or terracotta roofing, where a black or neutral grey extension would create an undesirable colour contrast at this exposed point of the roof.

Function and purpose of the vertical roof flue

In a vertical flue gas path solution, where flue gases are not routed through the facade but through the roof structure, it is necessary to ensure that the pipe outlet is located at a sufficient height above the roof surface – typically around 1.5 m above the roofing level, with the exact value according to the manufacturer's technical documentation. This height ensures proper dispersion of the flue gases into the surrounding air without the risk of accumulation near the roof surface, which could otherwise reach open roof windows, dormers, or ventilation openings of the roof structure. This extension is the final functional part of the boiler's entire flue gas path.

Why choose the red version of the exterior extension

While the components of the path routed inside the building are usually hidden from view, with colour playing no practical role, the vertical roof extension, on the other hand, is one of the most visible points of the entire flue gas path – it protrudes above the roofing and is visible from the surroundings even at a distance. On roofs with red, brick, or terracotta roofing, the red version of this part therefore delivers a significantly better visual result than the standard black version, which would appear as a disruptive foreign element on such a roof. The colour of the surface finish is designed to match common shades of fired roof tiles for a long time.

Construction and components

The vertical roof flue consists of a vertical pipe section corresponding to the diameter of the concentric flue used in the given installation, terminated with a top cover (terminal) designed to prevent rainwater from entering the pipe, while not restricting the free discharge of flue gases and the intake of combustion air in the concentric routing. The outer surface is finished in red, matching common types of fired roof tiles, with resistance to UV radiation and weather effects for the entire expected lifetime of the roof. The plug-in joints at both ends of the extension are compatible with other components of the Vaillant flue system.

When to choose a vertical solution instead of horizontal routing through the facade

• Aesthetic requirements for the facade – the investor or architect does not want a flue outlet on the visible part of the facade,
• Unsuitable or inaccessible perimeter wall – if all perimeter walls near the boiler are shared with an adjacent building, or too far from the boiler,
• Renovation using the original roof opening – for example, after removing the original chimney for a solid fuel boiler, where it is advantageous to use the existing roof penetration,
• Colour-matched installation on a roof with red roofing – if the investor wants even the visible flue gas path extension to match the colour of the roofing, not just the roof flashing itself.

Installation

Installation of the vertical roof flue follows on from an already installed roof flashing (a separately supplied component) and is part of the overall installation of the flue gas path carried out by a qualified professional. Installation includes properly anchoring the vertical pipe section to the roof or roof structure using suitable clamps and brackets to prevent it from being deflected by wind or its own weight, as well as checking the correct slope and drainage of any condensate back toward the boiler.

An important aspect of the installation is also maintaining the prescribed clearance distances of the outlet from surrounding structures – adjacent roofs, chimneys, ventilation openings, and roof windows – as well as ensuring accessibility of the extension for future maintenance or replacement of the terminal.

Compatibility

This vertical roof flue is intended for concentric flue gas systems of Vaillant condensing gas boilers of the ecoTEC, ecoTEC plus, ecoTEC exclusiv, and turboTEC series, using the corresponding concentric pipe diameter. Before ordering, we recommend verifying the exact diameter of the path according to the technical documentation of the specific boiler and connecting components, as well as compatibility with the roof flashing chosen for the given roof type and pitch. The same extension is also available in a black version for roofs with dark roofing.

Material and durability

Due to permanent exposure to weather effects (rain, frost, snow, sunlight, wind), the vertical roof flue is made of materials with high resistance to corrosion and UV degradation, retaining their mechanical and sealing properties over the long term even after years of continuous exposure to outdoor conditions. The inner surface of the pipe is also resistant to the acidic condensate generated during the operation of condensing technology. The red paint finish is chosen to retain its colour intensity for a comparably long time as the fired roof tiles themselves.

Why choose an original Vaillant part

The flue gas path outlet above the roof is an exposed location in terms of both weather effects and safety (height, access for maintenance), which is why using an original, precisely dimensioned component is particularly important. A non-original or incorrectly dimensioned extension could cause leaks, water ingress into the roof structure, or improper dispersion of flue gases into the surroundings, with possible consequences for the safety and comfort of the surrounding areas. An original part also guarantees that the warranty on the entire boiler flue gas path remains valid.

Maintenance

An annual inspection is recommended as part of the boiler's service check, focused on the condition of the top terminal (mechanical damage, corrosion, blockage by birds or leaves), the tightness of joints on the vertical section, the condition of the roof anchoring elements, and the condition of the colour finish. Given the elevated position of this inspection, we recommend always entrusting it to a qualified professional with the appropriate equipment for safe work at heights. Slight colour fading over the years due to UV radiation is a natural phenomenon that also affects the roofing itself to a similar extent.

Frequently Asked Questions (FAQ)

At what height above the roof must the outlet be located?
The exact height depends on the manufacturer's technical documentation and the specific roof configuration, typically around 1.5 m above the roofing level, to ensure proper dispersion of flue gases into the surrounding air.

Do I also need a separate roof flashing for this flue?
Yes, the roof flashing is a separately supplied component that ensures a watertight penetration through the roofing, to which this vertical extension connects.

Is the red version functionally different from the black one?
No, it is the same component with identical technical parameters, differing only in the colour of the outer surface, adapted to red, brick, or terracotta roofing.

Can I combine red and black components in one path?
Yes, this is not a functional problem, but we recommend choosing the colour based on which sections of the path are visible and the colour range of the surrounding roofing.

How often should this extension be inspected?
An annual inspection is recommended as part of the boiler's regular service, carried out by a qualified professional with equipment for working at heights.

Can this extension be lengthened later if the original height turns out to be insufficient?
Yes, separate extensions from the Vaillant accessories range in the same colour finish can be added to the path, connecting via the same plug-in joint system as the other flue gas path components.

Summary

The Vaillant vertical roof flue in red is a key component for the safe and aesthetically appropriate vertical routing of a condensing boiler's flue gas path above a roof with red, brick, or terracotta roofing. Combined with the roof flashing, it provides a complete and reliably long-lasting solution for flue gas discharge along a vertical path, as an alternative to the more common horizontal routing through the facade, without any compromise in functionality compared to the standard black version.

Impact of roof orientation and exposure on material selection

Roof sections facing south are exposed to more intense sunlight, which can accelerate UV degradation of the extension's outer colour surface over the years. The material used to manufacture this part is designed with a sufficient margin for this exposure, but in extremely exposed locations (for example, high-altitude areas with intense sunlight), we recommend a somewhat more frequent visual inspection of the colour surface condition as part of regular servicing.

Relation to chimney sweep inspection

The vertical roof flue, like the entire flue gas path, is subject to regular mandatory inspection by a chimney sweep according to applicable legislation. Given the elevated position of this part of the path, safe access must be ensured for the chimney sweep, whether by means of a roof ladder, walkway, or other safety element, which should be part of the roof's project documentation already at the design stage, not addressed later at the first inspection.

Recommendations for project preparation

When designing a new building or renovation with a vertical flue routing and roofing colour in red, brick, or terracotta shade, we recommend taking the colour concept into account already at the roof structure design stage, including ensuring safe access for future maintenance and inspection, and coordinating with other roof penetrations (ventilation stacks, antennas, solar panels) to avoid mutual collisions or an unsuitable aesthetic result on the finished roof.

Comparison with horizontal routing through the facade

Compared to horizontal routing of the flue gas path through the facade, the vertical solution through the roof has the advantage that the outlet is not visible from street level or from adjacent properties, contributing to a cleaner appearance of the building's facade. When the visible extension is colour-matched to the roofing, this aesthetic benefit is even more pronounced, as the flue gas path appears, even from a distance, as an integral, aesthetically considered part of the roof rather than a foreign technical element.

Aesthetic aspect of colour matching

Many architects and investors choose colour-matched versions of the visible flue gas path components for aesthetic reasons – the effort to make technical elements on the roof as unobtrusive as possible is part of a broader trend in modern heating technology, where increasing emphasis is placed not only on functionality but also on the aesthetic integration of technical elements into the overall architectural appearance of the building. When selling a property or when a potential buyer evaluates the quality of the installation, such seemingly small details can surprisingly play a significant role.

Combination with other red components of the path

On roofs with red roofing, this vertical extension is usually combined with other red flue components – the roof flashing, and possibly also elbows or extensions in the same colour finish, if these sections of the path are also visible – so that the entire visible part of the flue gas path above the roof appears as a unified, colour-matched whole. When ordering a complete colour-matched set, we recommend that customers and installation companies order all visible exterior components in the same colour batch from the same supplier, to avoid any minor shade discrepancies between different production batches.

Safety of working at heights during installation and servicing

Installation and subsequent maintenance of the vertical roof flue require work at heights, which is subject to strict safety regulations concerning worker protection (safety harnesses, access ladders, roof walkways, and fall arrest systems). The installation and service company should hold appropriate authorisations for this type of work, have trained personnel, and certified safety equipment, as this involves work with a higher risk of injury than standard installation inside the building.

Relation to flue gas path sizing in a vertical solution

From an aerodynamic point of view, a vertical flue gas path has a slight advantage over horizontal routing in the form of the natural buoyancy of the warm flue gases (chimney effect), which partially supports their natural discharge beyond the capacity of the boiler's flue gas fan itself. This fact is taken into account in the overall calculation of the flue gas path sizing, together with the length of the path, the number and type of components used, and their pressure losses, including this vertical extension.

Combination with adjacent roof elements

During installation, it is advisable to coordinate the position of the flue outlet with other technical roof elements, such as photovoltaic or solar thermal panels, sewer ventilation, satellite antennas, or lightning conductors. Unsuitable placement close to solar panels could lead to their contamination with condensate or soot from the flue gases, or to shading of the panels by the extension itself, which would reduce their energy yield. Conversely, proximity to a lightning conductor requires compliance with the prescribed safety distances according to applicable standards.

Storage and handling

Until installation, we recommend storing the extension in a dry environment protected from direct sunlight, which could, during prolonged storage out of use, accelerate the aging of the colour surface even before it is installed in the path. During handling, avoid sharp objects and excessive mechanical loading to prevent damage to the surface finish or deformation of the plug-in joints at both ends of the component.

Customer support in choosing the correct colour shade

If a customer is unsure of the exact shade of their roofing compared to the available red version of this extension, we recommend contacting the atria.sk customer service, which can provide more detailed information about the available shade or recommend the closest matching variant from the manufacturer's current range.

Long-term value of investing in an original extension

Although it may seem like a relatively simple, purely functional part, its role in the overall flue gas discharge system is crucial – this extension is the final link in the entire flue gas path, determining exactly how and where the flue gases from the boiler are released into the surrounding air, and it is also the most visible point of the entire path. Investing in a quality, original, and colour-matched part pays off in the form of long-term safe, quiet, and aesthetically satisfactory operation without the risk of leaks, blockages, or improper dispersion of flue gases near the roof.

Summary of technical recommendations for installation companies

For installation companies, we recommend following this checklist sequence for every installation of the vertical roof flue in the red version: verifying the diameter and compatibility with the rest of the flue gas path, selecting a suitable roof flashing according to the roof pitch and roofing type, verifying colour matching with the roofing directly on site, ensuring sufficient anchoring of the vertical section, ensuring the prescribed outlet height above the roofing, maintaining clearance distances from surrounding structures, and finally ensuring safe future access for chimney sweep inspection and servicing. Consistently following this sequence for every installation minimises the risk of complaints related to leaks, improper dispersion of flue gases, or problematic access during future inspections, while also guaranteeing the investor's satisfaction with the final aesthetic and functional result of the entire installation.