Precision climate control for production and office areas from a single source

Ateliers Nic. Georges – or ANG for short – was founded over 100 years ago. The company’s workshop originally repaired automotive engines, but its second generation then added another pillar to the business in the form of metal parts machining. Today, ANG uses state-of-the-art systems to turn, mill and erode high-precision parts with tolerances in the thousandths of a millimetre range.  

The founder’s great-grandson relocated the company headquarters from central Luxembourg to an industrial estate. In 2023, the time came to construct a new building, whose planned structure presented two different features with requirements for the HVAC systems: a three-storey office wing and a large hall with a two-storey side wing. The latter required a consistent temperature of 22°C in summer and winter alike in order to ensure that the laser-measured precision components would retain their exact shape.  

To meet these demanding requirements, installation company a+p kieffer omnitec approached General Technic, Hoval’s sales partner for Luxembourg. Together, they developed a simple, reliable and economical climate concept for both the production hall and office areas.  

The climate solution for the 8.6-metre-high production hall and adjoining areas spanning more than 2,000 m² is centred on the RoofVent RP-6 supply and extract air handling unit with a capacity of 5,500 m³/h, combined with the TopVent TP-6 recirculation unit, which provides an additional airflow of 6,000 m³/h. Both units have their own heat pump, ensuring added reliability during operation.  

The duct-free installation removes the need for lines, which in turn means no maintenance, cleaning, energy loss or obstructions during work (caused by cranes, for example). Maintenance on the RoofVent unit is performed from the roof, allowing production to continue uninterrupted. Not only that, but the TopVent unit can sub in while this maintenance is taking place – a redundancy feature that is also a benefit of the decentralised concept. 

Thanks to the patented Air-Injector, welding operations can continue without disruption. The system ensures optimum air distribution indoors and, at the same time, reduces the temperature difference between the room temperature below the roof and the outdoor temperature, helping to reduce transmission losses while maintaining very low air velocities.

While RoofVent and TopVent ensure optimum conditions in the production hall, Hoval also supplied the climate solution for the office areas. The proposed solution was simple yet impressive: it would use the Belaria fit (53) heat pump to provide heating and cooling for the site – which measures some 1000 square metres – through underfloor heating and cooling ceilings.  

The inverter technology used enables this capacity to be modulated in the range from 40 to 100%. This means that both heating and cooling capacity can be optimised to meet prevailing requirements and the power consumption of compressors and fans is reduced in partial load operation. The unit switches on and off less frequently, which means it cycles less, operates more smoothly and protects the compressor.  

In fact, all the components can be operated intuitively using the Hoval TopTronic controller, and any problems can be resolved quickly and easily using remote maintenance. The three air heat pumps primarily draw current from the PV system with a 200 kW peak. This means that the new building does not rely on any fossil fuels at all for its heating, cooling and ventilation needs.  

The result is a fossil-free heating, cooling and ventilation solution that supports precision manufacturing while delivering energy-efficient and reliable operation across both the production and office areas.