AZ Diest

In the brand-new AZ Diest hospital, quality, comfort, and energy efficiency are central. Commissioned by AZ Diest and with Cordeel-VDS as the main contractor, Imtech was responsible for the implementation and integration of the complete HVAC and related technical systems. The result is a high-tech, future-oriented healthcare building featuring five operating theatres (ISO5 and ISO7), 90 patient rooms, 956 m² of office space, a cafeteria, and parking facilities. All these areas were designed to support optimal care in a controlled, safe, and comfortable environment.

Complex technical requirements, a wide range of technologies

Hospitals impose exceptionally high demands on their technical installations. Temperature, air quality, hygiene, and continuous operation of critical hospital processes are essential in every space, especially in operating theatres.

Imtech delivered a wide range of seamlessly integrated technologies:

Steam production via high-pressure steam generators (2 x 589 kW, 2 x 855 kg/h)
Condensing high-efficiency boilers (2 x 800 kW in cascade)
Advanced heating and cooling generation using a four-pipe heat pump system (Heating: 2 x 580 kW – Cooling: 2 x 460 kW)
ATES system with eight wells at 85 meters depth (22.50 m³/h per well – 4 warm wells at 12.5°C)
Dry coolers (3 x 365 kW)
Air handling installations with 20 air handling units with heat recovery
Chilled ceilings and underfloor heating for a stable and comfortable indoor climate
Domestic hot water production, sprinkler systems, fire mains, and hose reels
Parking ventilation
Pneumatic tube system for logistical efficiency (150 lm + 3 switches)
Building management system (Johnson Controls)

In addition, Imtech installed the electrical HVAC panels for full control of pumps, air handling units, and motorized valves.

600 sensors and control valves for continuous performance

To ensure stable and energy-efficient operation, the hospital is equipped with approximately 600 sensors (for precise measurements such as temperature and humidity in air handling units) and an equal number of electronic, pressure-independent control valves. For this, Imtech collaborated with Belimo, a specialist in intelligent control components for HVAC systems.

These smart components enable fast and precise commissioning of all technical installations and ensure that the building management system continuously guarantees optimal performance.

A sustainable investment in healthcare

Construction works started in January 2023 and were successfully completed in July 2025. The new hospital combines comfort, energy efficiency, and reliability into one integrated whole.

This project reflects our expertise in complex healthcare environments, where technical installations have a direct impact on patient comfort and the functioning of medical staff. The result is a future-proof hospital, ready to support high-quality care today and tomorrow.

With thanks to:

The realization of this project was the result of close collaboration between all involved partners:

AZ Diest, under the leadership of Facility Director David Van Eykeren
Main contractor Cordeel-VDS and coordination partner WEMA, under project manager Kurt Vantomme
Engineering firm M-gineers, under project manager Stefan Aerts

Within Imtech, the project was delivered by a multidisciplinary team of project managers, engineers, technicians, and installers: