Underfloor vehicle exhaust extraction systems: the invisible solution for your workshop

Creating a healthy working environment is a priority - and a legal requirement - for every automotive workshop. Vehicle exhaust extraction plays a central role in protecting operators from harmful fumes generated during testing, maintenance and vehicle handling.

Among the different solutions available, underfloor vehicle exhaust extraction systems are one of the most discreet and visually effective options. They keep the workshop free from overhead equipment, while still providing reliable extraction directly at the source.

But how do these systems work? When are they the right choice? And what should you consider before specifying floor-mounted exhaust extraction pits? In this guide, we look at the features, benefits and limitations of underfloor systems, with a focus on the WORKY solutions designed for modern workshops.

What is an underfloor exhaust extraction system?

An underfloor exhaust extraction system is a workshop installation where the extraction point is integrated into the floor rather than suspended from the ceiling or mounted on walls. Instead of using overhead arms or hose reels, the operator accesses a floor pit, connects the flexible hose to the vehicle exhaust and conveys the gases through underground ducting to a central extractor.

The extractor is usually positioned outside or away from the main work area, while the floor-mounted extraction points remain available exactly where vehicles are tested or moved.

The result is a clean, uncluttered workshop layout with no visible overhead obstruction - an important advantage for showrooms, delivery areas, premium workshops and facilities where aesthetics matter as much as functionality.

How WORKY floor-mounted extraction pits are built

For an underfloor system, durability is essential. Once installed, the extraction pit becomes part of the workshop infrastructure, so every component must be designed to last. WORKY floor pits are made from robust sheet steel and protected by a dedicated galvanising process. This helps ensure excellent resistance to corrosion and a long service life, even in demanding automotive environments.

The WORKY range includes two main floor-pit solutions, depending on how often the extraction point is used.

GFT-B: for occasional use

The GFT-B model uses a floor-mounted pit closed by a cover. When exhaust extraction is required, the operator inserts a dedicated bend into the pit and connects the flexible hose for vehicle exhaust extraction. This solution is particularly suitable for areas where extraction is needed only occasionally, such as vehicle handover zones, training centres, inspection points or spaces where keeping the floor and ceiling visually clear is the main priority.

GFT-BR: for frequent use

The GFT-BR model is designed for greater day-to-day practicality. In this configuration, the bend is already installed below the floor and houses a flexible hose that can be pulled out when required.

This makes the system more convenient for workstations where vehicle exhaust extraction is a daily operation and where the extraction point is positioned close to the vehicle.

When should you choose an underfloor exhaust extraction system?

Underfloor extraction is not a universal solution for every workshop. It is a highly effective option when the project conditions are suitable, but it must be planned at the right stage.

The first and most important point is that an underfloor vehicle exhaust extraction system should be specified only when the workshop floor has not yet been built, or during a complete renovation.

Installing this type of system in an existing workshop generally requires major building work and is usually not cost-effective.

Key benefits of underfloor extraction pits

Sobald die Hauptvoraussetzung erfüllt ist, sind die Vorteile dieser Lösung unbestreitbar:

• Clean aesthetics: This is one of the most discreet systems available. Walls and ceilings remain free from equipment, making it ideal for premium garages, showrooms and vehicle delivery areas.
• Optimised working space: With no overhead hose reels or arms, operators can move more freely and the workshop remains visually organised.
• A solution for complex ceilings: Underfloor extraction is particularly useful where the ceiling is very high, occupied by overhead cranes, or unsuitable for suspended systems.
• Efficient source capture: When correctly designed and dimensioned, underfloor systems provide the same extraction performance as other WORKY solutions.
• Flexible technical integration: The system can be combined with modern nozzles, power control through inverters and wheeled adapters for specific vehicle types.

Points to consider before choosing an underfloor system

• Permanent layout: Once installed, floor pits cannot easily be moved. Any future change to the workshop layout must take the extraction positions into account.
• Operator ergonomics: Using a floor pit may require the operator to bend or kneel to connect the hose. This should be considered when planning frequent-use workstations.
• Cleaning and maintenance: Maintenance costs are generally low, but the internal floor pit must be cleaned periodically to maintain efficiency.
• Civil works: The system requires underground ducting and correct installation of the floor pits, so coordination with architects, contractors and technical designers is essential.
• Project timing: Underfloor systems are best suited to new-build workshops or complete refurbishment projects, not to simple upgrades of existing facilities.

Underfloor extraction vs other vehicle exhaust extraction systems

Do underfloor systems compromise extraction performance?

No. Choosing a floor-mounted exhaust extraction pit does not mean compromising on performance. When the system is designed correctly, underfloor extraction can provide the same extraction capacity and reliability as other WORKY systems.

The key is proper engineering: the number of extraction points, the length and slope of the underground ducting, the required air flow, the extractor power and the choice of nozzles must all be assessed together.

WORKY underfloor systems can also be equipped with latest-generation exhaust nozzles, inverter-based power regulation and wheeled adapters for sports cars or vehicles with complex exhaust geometries. This allows the solution to be configured around the real needs of each bodyshop, service centre or automotive facility.

Why planning is essential

With an underfloor system, planning is everything. Unlike a mobile extractor or a suspended hose reel, floor pits become part of the building itself. The layout must therefore be defined before construction or during a full renovation.

A correct project should evaluate:

• the number of extraction points required;
• the position of each vehicle workstation;
• the distance between floor pits and the central extractor;
• the diameter and slope of the underground ducting;
• the type of vehicles handled in the workshop;
• the future scalability of the facility.

This is why choosing an experienced partner is essential. WORKY supports customers, designers and contractors in defining the most suitable configuration, helping ensure that the final installation is safe, efficient and reliable over time.

WORKY: discreet systems, visible performance

Underfloor vehicle exhaust extraction is the right choice when a workshop needs a clean, organised and professional layout without sacrificing safety or extraction efficiency.

For new-build workshops, premium service areas, training centres and facilities with complex ceilings, WORKY floor-mounted extraction pits offer a discreet yet high-performance solution, designed around the real workflow of the space.

The WORKY technical and sales team can analyse your project, evaluate the layout and recommend the most suitable underfloor exhaust extraction configuration - from the number of floor pits to the correct extractor size and accessories.

Frequently asked questions

What is an underfloor vehicle exhaust extraction system?

It is a system where the exhaust extraction points are integrated into the workshop floor instead of being suspended from the ceiling. Exhaust gases are captured through floor pits and conveyed through underground ducting to an extractor.

Can I install an underfloor extraction system in an existing workshop?

It is generally not recommended. Underfloor systems require significant work on the flooring and underground ducting, so they are best suited to new-build workshops or complete renovation projects.

What is the main advantage of floor-mounted exhaust extraction pits?

The main advantage is the clean and unobtrusive layout. The system remains almost invisible, leaving walls and ceilings free from equipment while maintaining effective extraction at the source.

Are underfloor extraction systems suitable for heavy vehicle workshops?

Yes, they can be suitable when properly designed. They are especially useful where high ceilings or overhead cranes make suspended systems difficult to install, but the extractor, ducting and nozzles must be dimensioned for the type of vehicles handled.

Do underfloor systems perform as well as hose reels or fixed systems?

Yes, provided the system is correctly engineered. Extraction performance depends on proper sizing, duct design, extractor power and the choice of accessories, not simply on whether the system is installed below the floor or above it.

Affidati agli esperti per un impianto a regola d'arte

La pianificazione è tutto. Le variabili da considerare sono molte: il numero di punti di aspirazione, la loro distanza, la potenza dell'aspiratore e la corretta pendenza delle tubazioni.

Per questo è fondamentale affidarsi a chi se ne intende. Il personale tecnico-commerciale di WORKY è a tua disposizione per analizzare il tuo progetto e suggerirti la configurazione migliore, garantendo un investimento sicuro e un risultato performante nel tempo.