Welding Fume Filtration with GRAM Welding Filter Towers
A large volume of welding fumes had to be removed from Harmet Metall's metal structures production hall without using a point extraction system, as the components were large and mobile. As a solution, two GramCleanAir welding filter towers were installed to clean the welding fumes spreading throughout the hall. The result is improved air quality and a safe, healthy working environment for welding operators.


The project challenge
The production process handled large metal components, which were continuously moved and manipulated during work. It was precisely for this reason that it was not possible to install a specific point extraction system that would direct the fumes away directly from the source. The challenge was to find a solution that would clean the welding fumes spreading generally throughout the hall.
How we built it
Since point extraction was not feasible due to the movable components, the most sensible approach turned out to be the GramCleanAir welding filter towers solution, which cleans the air spreading generally throughout the hall. After examining a demo unit, the customer decided to procure the filter towers for their production.
- 2 GramCleanAir welding filter towers
What we achieved
- Air cleaned of welding fumes spreading throughout the entire production hall – without a point extraction system
- Improved air quality in the production hall
- A safe and healthy working environment for welding personnel
- A sustainable solution that supports a smooth production process even when handling large, movable components
Galerii
FAQ
Frequently asked questions
Is the GramCleanAir welding filter tower suitable even when point extraction cannot be used?
Why was point extraction not possible in this project?
How many welding filter towers were installed in the Saue factory?
What results did this solution deliver in the production hall?
Can the solution be tried before purchase?
Projects
More similar projects
Welding hall ventilation solution with smart remote management
We built a push-pull general ventilation system for the welding hall with two separately controlled zones, ensuring a total air circulation of up to 60,000 m³/h (the requirement was ≥45,000 m³/h) and over 10,000 m³/h of fresh air. We installed two GRAM 364DH double cyclones with 45 kW fans and a C.I.C Jan Hrebec plate heat exchanger with water heating, which reduces heating demand. Compliance of air quality with health protection limit values was confirmed by measurements carried out together with the Health Board, and the entire system is controlled by a single control panel with real-time remote management.
Push-Pull welding ventilation for a metal production hall in Saue
At a metalworking company's production hall in Saue, we solved the blue welding fume problem using the Push-Pull method, as the use of welding arms was not possible due to the large components and continuous crane operation. We installed an FL series filter with GRAM welding cartridges, prepared a 3D piping installation drawing, and carried out the installation. The filtered air is directed into the hall from floor level, and the welding fumes are extracted from above the workstation, beneath the ceiling.
Factory Welding Workshop Push-Pull Ventilation
We upgraded the ventilation of the manual welding stations at Sami Tootmine's Valga factory in two areas, each with 10 workstations. We installed cyclone filters together with fans from the Danish manufacturer Gram Clean Air and designed a push-pull ventilation system with air calculations. We integrated automation that activates the filter system only when welding is actually taking place, ensuring energy savings and a clean working environment. In addition, we helped find a suitable welding filter for the robotic welding area.