DIOR & EVROPROM: Focused Engineering for the Heart of Paris

The Dior boutique in central Paris is a benchmark of global luxury and refined aesthetics. From classic ornamental moldings to cutting-edge lighting, every element is designed to preserve the historical architecture while supporting a modern retail experience. This is a space not just for shopping but for inspiration — combining the tradition of haute couture with a modern approach to atmosphere.

Given Dior’s reputation as one of the most prestigious fashion houses in the world, the requirements for HVAC systems were exceptionally strict. Any mechanical noise, vibration, or visual intrusion could affect the customer experience and brand perception.

EVROPROM’s engineering experience enables work within environments where acoustic limits must not exceed 27 dBA and no exterior-mounted equipment is allowed. Only proven, highly customized solutions are considered.

In this project, the SYSTEMAIR WQL 30 BLN chiller was selected — a compact and reliable unit with water-cooled condenser, fully integrated indoors to meet architectural and acoustic requirements.

Engineering & Heat Load Calculation in Dense Urban Fabric

Thermal loads were calculated using ASHRAE methodology, taking into account solar exposure, internal equipment, occupancy, and building architecture.

• Area: 120 m²
• Ceiling height: 3.8 m
• Volume: 456 m³
• Peak load: 28.3 kW at ambient temperature of +35 °C

Ventilation was designed to deliver 2964 m³/h of clean air via precision diffusers. A temperature delta of 15 °C ensured the setpoint of 22 °C and controlled humidity.

One key feature — no visible air distribution: all ductwork was integrated into a suspended ceiling system, equipped with sound-absorbing liners reducing noise by up to 18 dB per branch.

SYSTEMAIR WQL 30 BLN: Compact Engineering Genius

• Cooling capacity: 31.1 kW (at 12/7 °C water, 35 °C glycol); capacity calculated for a 120 m² space with up to 28.3 kW heat load; ensures stable cooling performance even at ambient temperatures up to +35 °C;
• Compressor group: 1 × Copeland scroll compressor; discharge pressure 9.2 bar, suction pressure 4.3 bar; guarantees smooth, quiet operation and extended service life; minimal vibration, critical for high-end retail environments;
• Refrigerant: R410A; specific heat capacity 0.88 kJ/kg·K; high heat transfer efficiency; reduced refrigerant charge; optimized ecological profile;
• Heat exchanger: plate-type; heat transfer coefficient 1870 W/m²·K; rapid system response to temperature changes; compact design adapted for indoor installation;
• Dimensions: 0.82 × 0.345 × 1.35 m; compact footprint; easy installation in tight mechanical rooms or technical spaces;
• Weight: 179 kg; optimized structural weight-to-strength ratio; mountable with vibration isolation to minimize sound transmission;
• Cooling system: water-cooled condenser; fanless design; external hydronic loop for heat rejection; ensures fully silent operation;
• Noise level: no more than 39 dBA at the casing; meets stringent luxury retail acoustic standards; effectively acoustically invisible;
• Control system: proprietary EVROPROM controller; Modbus protocol integration with BMS; automatic pressure and temperature adjustment; QR passport for every component; advanced diagnostics and control visibility.

Optimized Hydronic Loop: Reliable Flow and Pressure

The system features a hydronic circuit with a flow rate of 5.35 m³/h at an operating pressure of 21 kPa, providing stable cooling even during peak summer conditions. Smart design and premium materials minimize hydraulic losses — limited to only 2.1 m water column.

Copper piping with silver-brazed joints ensures long-term system integrity and corrosion resistance. Effective vibration isolation components limit mechanical oscillations to 0.9 mm/s — crucial for protecting fragile historical structures from long-term stress.

This ensures not only the longevity of the HVAC installation but also silent operation inside the boutique — preserving the calm, luxurious atmosphere.

Full Automation and Real-Time Environmental Control

The climate system is equipped with 12 temperature sensors and 4 humidity control zones, enabling precise environmental regulation with an accuracy of ±0.3 °C. In a luxury retail space, such precision directly impacts product preservation and visitor comfort.

Humidity control prevents condensation on surfaces and protects delicate materials — from premium textiles to interior finishes. Stability is key in environments where even minor fluctuations can affect merchandise presentation and quality.

Refrigerant pressure is monitored every 20 seconds, minimizing the risk of leaks or operational deviations. Power is stabilized through a 10 kW voltage regulator, safeguarding equipment performance even during fluctuations in the urban electrical grid.

EVROPROM Engineering for DIOR: Acoustic and Thermal Simulation

One of the most critical stages of the project was CFD modeling — computational fluid dynamics — used to simulate airflow and heat zones, especially around display windows, where solar gain reaches up to 92 W/m², adding approximately 11 kW of thermal load over the boutique’s 120 m² area.

To evenly distribute cooled air, 12 supply points were strategically located, delivering a total of 2964 m³/h with an air exchange rate of 6.5 times per hour.
Silencers with up to 18 dB attenuation brought overall acoustic levels down to 24 dBA — comparable to a quiet library, and significantly below the maximum thresholds for luxury commercial interiors.

To mitigate vibration impact, particularly in a fragile, historically significant building, anti-vibration mounts with a damping factor of 0.9 mm/s² were installed — three times lower than the limit for residential structures.

All equipment enclosures are made from composite panels with a sound insulation rating of 38 dB, making the chiller system acoustically invisible. This not only protects architectural heritage but enhances comfort for guests and staff.

Verified Efficiency: Real-World Performance Metrics

At peak thermal load, the system consumes just 5.4 kWh per hour with an outdoor temperature of +33 °C, demonstrating outstanding efficiency with a COP of 3.76 — around 15% above standard benchmarks for commercial HVAC systems.

Chilled water flow is maintained at a stable 5.12 m³/h, ensuring optimal heat exchange and eliminating unnecessary resource consumption. This supports precise setpoint control and reduces compressor cycling, which extends the system’s lifespan.

Noise levels were meticulously measured at multiple points:

• Equipment casing: not exceeding 36 dB — two to three times quieter than regular human conversation;
• Sales area: 24 dBA, equivalent to a whisper or the sound of pages turning in a library — a critical acoustic achievement in a luxury boutique environment.

Vibration levels were recorded at below 1 mm/s², three times lower than the permissible threshold for historically sensitive buildings. This eliminates any risk of structural damage from mechanical activity and maintains absolute quiet inside the space.

Technical Oversight and Post-Installation Support

The EVROPROM installation team carried out the project with the utmost precision, including the use of anti-vibration decoupling on every unit. Damping coefficients were carefully calculated to reduce vibration transmission to the lowest measurable levels, preserving both structural integrity and acoustic comfort.

All pipe joints and brazed connections were made using copper with silver-based flux, ensuring long-term leak-tightness, corrosion resistance, and compliance with industrial safety standards.

Each system component is assigned a QR passport, providing instant access to:

• Operating parameters,
• Maintenance logs,
• Diagnostic data,
• Service intervals.

The monitoring infrastructure is based on EVROPROM’s proprietary control unit, seamlessly integrated into the BMS via Modbus protocol. The system ensures real-time data exchange, updating every 20 seconds. It allows rapid response to any deviations in:

• Refrigerant pressure,
• Temperature setpoints,
• Humidity levels.

Preventive maintenance is carried out using advanced diagnostic tools, minimizing the risk of unexpected failures and extending the system’s operational life beyond 15 years.

Conclusion

For EVROPROM, the DIOR project became a quintessential showcase of engineering discipline, where tolerances are measured in tenths of a degree Celsius and decibels. Every technical parameter was verified with precision:

• Air temperature controlled to within ±0.3 °C,
• Noise levels limited to 24 dBA,
• Hydronic flow stabilized at 5.35 m³/h with a pressure of 21 kPa and losses under 2.1 m H₂O.

The company has proven its ability to deliver climate control solutions for the most demanding clients, combining engineering expertise, innovation, and a deep understanding of architectural and operational requirements.

This project stands as a definitive example of why EVROPROM is chosen by clients who demand maximum precision, reliability, and HVAC innovation.

Author of the article:

Sergey Stafiychuk, Head of Sales Department

07.08.2025