HVAC Systems for Office and Administrative Buildings

Good indoor air quality is an essential part of a good workplace. In office and administrative buildings, HVAC systems provide fresh air and comfortable temperatures—from individual offices to conference rooms to large open-plan office spaces. Demand-controlled ventilation and efficient heat recovery help combine comfort with energy efficiency.

What are the key considerations for ventilation in office and administrative buildings?

Good Indoor Air Quality
People release CO₂, moisture, and other substances into the indoor air. An adequate supply of outdoor air ensures good indoor air conditions even during prolonged use and at higher occupancy levels.

Demand-Controlled Ventilation
Offices, meeting rooms, and conference areas are used in very different ways. Airflow rates controlled based on CO₂ levels or occupancy allow ventilation to be adjusted to actual needs, rather than operating continuously at maximum airflow.

Comfortable Temperatures
In addition to ventilation, room temperature plays a particularly important role in the summer. HVAC systems can condition the supply air accordingly, thereby helping to cool the rooms.

Quiet Operation
Especially in offices and meeting rooms, the ventilation system itself must not become a source of disturbance. Equipment, airflow design, and sound attenuation should therefore be coordinated to ensure the quietest possible operation.

Energy Efficiency 

Heat recovery, efficient fans, and demand-based control reduce energy consumption. Especially with fluctuating occupancy, there is significant potential in supplying, heating, or cooling only as much air as is actually needed.

HVAC Solutions for Office and Administrative Buildings

The appropriate HVAC solution for offices and administrative buildings depends on the building’s size, intended use, air volume, and desired functions. HANSA offers both compact and custom-designed air handling units for these applications - featuring efficient heat recovery and demand-based control.

Kompakt Line - Compact AHU Solution for Offices and Administrative Buildings

- Airflow rates from 1,500 to 8,000 m³/h.

- Compact unit design

- short installation times, minimal space requirements.
- heat recovery efficiency minimum according to EU regulations

- Heating and cooling

- Integrated control system for demand-based operation, including remote connectivity via etaConnect

- Suitable for new construction and retrofits

Blue Line - Customized AHU Solution for Larger and More Demanding Buildings

- Project-specific equipment design

- installation inside the building or weatherproof outdoor installation 

- various heat recovery systems

- also suitable for high airflow rates up to 65,000 m³/h.

- Heating, cooling, and humidification and dehumidification

- Optional integrated refrigeration system—also for reversible heating and cooling operation

- Flexible filter and sound insulation concepts 

- With integrated demand-based control; etaConnect remote connection included

Why HANSA?

Tailored to the Building, Not Off-the-Shelf
Whether it’s a small administrative building, a large office space, or a complex building with different areas of use: HANSA adapts unit size, functions, and control systems to the actual requirements of the project.

Proprietary Control Technology
The unit, control panel, and control system are coordinated as a complete system. Different operating hours and varying occupancy levels can be taken into account, and airflow rates can be regulated according to demand.

Comfort and Efficiency Designed Together Good indoor air quality, comfortable temperatures, and quiet operation need not conflict with low energy consumption. Heat recovery, efficient components, and demand-based operation are all considered together right from the design phase.

Flexibility for New Construction and Renovation
Unit dimensions, air connections, and components can be adapted to the building’s specific conditions—an important advantage, especially when modernizing existing office and administrative buildings.

Service Throughout the Lifecycle
After commissioning, etaTECH provides support for maintenance, servicing, and optimization. This ensures that system availability and efficient operation are maintained over the long term.

The CO₂ concentration is a good indicator of a room’s actual occupancy. Demand-controlled ventilation can adjust the outdoor air flow rate accordingly. This helps prevent a situation—particularly in meeting rooms or office spaces with varying occupancy levels—where more air is continuously supplied and conditioned than is necessary.

In addition to people, lighting, computers, and other technical equipment can generate significant heat loads. Solar heat gain through the building envelope also contributes to this. A properly designed HVAC system can help remove these heat loads and maintain comfortable indoor conditions even when outdoor temperatures are high.

The larger a building is and the more varied its uses, the more challenging the control task becomes. Multiple zones, variable airflow rates, and a branched duct network all influence one another. A purely reactive control system takes these interdependencies into account only to a limited extent. 

Model Predictive Control (MPC) can predict the system’s behavior based on a model and proactively optimize control variables. This approach allows, for example, different room conditions, airflow rates, and the interactions between multiple system components to be taken into account collectively. This opens up potential for energy-efficient operation that is also tailored to demand, particularly in more complex buildings. The duct system can also be modeled accordingly. HANSA has already conducted several studies in this area at the HANSA office building and applied these findings to a project in the swimming pool area. The results are promising.

Even a well-designed HVAC system will operate reliably and efficiently over the long term only if its filters, heat exchangers, fans, and control systems are inspected regularly. Maintenance and operational optimization help prevent unnecessary pressure drops and energy consumption and ensure the desired indoor air quality over the long term.

Not looking for an air handling unit for offices or administrative buildings? Then why not take a look at our other application areas: