You walk into an office. The air feels heavy, stuffy, and within an hour you start to feel tired—even though you haven’t done anything yet. Sound familiar? Now imagine a different place: fresh air, pleasant temperature, no drafts. Work flows better, thoughts come quicker, and breathing feels easier.

Though often invisible, indoor air quality has a profound impact on how we feel, think, and function. And these are exactly the spaces where we spend most of our day—especially offices, which today must respond to new challenges: hybrid work, fluctuating occupancy, comfort needs, and cost optimization.

Here are 5 reasons why it’s worth investing in individual ventilation systems in office buildings.

1. Because user comfort is the foundation of effective work

Picture a busy open space. At first, everything seems fine—the IT team is coding, HR is interviewing, sales is making calls. But after a few hours, fatigue sets in, productivity drops, and conversations become increasingly chaotic. Few people connect this to ventilation, yet the culprit is often an invisible enemy: excessive CO₂ levels.

This is backed by hard data from a study conducted by the Harvard T.H. Chan School of Public Health. In an experiment with office workers, researchers measured the impact of different environmental conditions on cognitive performance. When CO₂ levels rose from 600 ppm (a typical value for well-ventilated rooms) to 1,400 ppm (common in conference rooms or outdated office spaces), participants’ cognitive performance dropped by as much as 50%.

What does this mean in practice for building owners or facility managers?

• Fewer mistakes at work—because higher CO₂ levels reduce logical thinking and decision-making capacity.
• Lower efficiency—because fatigue increases and people take more breaks.
• Higher staff turnover—because workplace comfort is one of the key factors influencing job satisfaction.

2. Because buildings “breathe” differently every day

According to CBRE’s 2024 report, average daily occupancy in Central European office buildings is just 53–65%, with weekly variations of up to 40%. This means that systems designed to run “at 100%” operate most of the time in an oversized mode.

This insight gave rise to Demand Controlled Ventilation (DCV) systems. Research in Scandinavia and Germany shows that in buildings with fluctuating occupancy, such solutions can achieve 30–60% energy savings without compromising air quality. The key is responding to real conditions—occupancy, CO₂ levels, even open windows or work schedules.

Advantages of demand-controlled ventilation:

• Dynamic adaptation to the actual number of people and activity levels.
• Reduced ventilation energy consumption, especially in large buildings with multiple independent zones.
• Better air quality during peak occupancy—thanks to real-time response.
• Possibility of integration with other building automation systems—occupancy calendars, BMS, environmental sensors.

3. How much air does your building really need?

In traditional CAV (Constant Air Volume) systems, air is supplied at a fixed volume—regardless of whether a room is full, half-occupied, or completely empty. It’s like boiling a full pot of water every day when you only need one cup of coffee. It works, but the energy waste is enormous—and efficiency close to zero.

This inefficiency has been studied since the 1990s, and today we have hard numbers. According to ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers), using VAV (Variable Air Volume) systems—which adjust airflow to real demand—reduces ventilation energy use by 30–60% compared to traditional CAV installations.

iFlow — optimizing ventilation system performance

Research in large U.S. office buildings (over 10,000 m²) found that:

• Up to 25% of total HVAC energy costs are caused by unnecessary ventilation in empty or underused zones.
• After implementing VAV with CO₂ and occupancy-based controls, payback time was just 2–4 years.

SMAY’s iFlow system works precisely on this principle. Unlike static solutions, it adjusts airflow room by room—based on sensor data (e.g., CO₂, occupancy) and scheduling. It also controls supply air temperature, averaging demands from multiple zones, so the air from the central unit is optimized not only for volume but also for temperature.

4. From design to daily management

In theory, modern HVAC systems should enhance user comfort, improve energy efficiency, and operate seamlessly in the background. In practice? Many designers know the feeling of lacking time to fine-tune an installation.

Fortunately, more and more solutions are moving towards simplicity—both in design and operation—without compromising quality. SMAY’s iFlow system was created with exactly this philosophy.

For designers:

• No need for hydraulic calculations.
• Modularity and flexibility to adapt to building layouts without redesigning the entire concept.
• Fewer ambiguities in handover documentation

For installers:

Faster installation and setup, without programming from scratch. iFlow comes with an auto-commissioning feature, allowing many tasks to be completed by the installation team without needing specialized service technicians. That means time savings and fewer delays at handover.

For facility managers:

Instead of closed software tied to specific workstations, iFlow has a built-in web server, enabling control and monitoring from any browser. In practice, this means:

• Access to room parameters from anywhere.
• The ability to adjust settings without visiting the central unit.
• Instant fault detection and diagnostics.

5. Because the future belongs to buildings that care for people and the environment

According to the European Environment Agency, the average European spends up to 90% of their time indoors. What’s more, the same agency reports that concentrations of certain pollutants (such as formaldehyde, VOCs, or fine particles) can be several times higher indoors than outdoors—especially in airtight buildings with low air exchange rates.

The Harvard COGfx Study (2015–2020), conducted by the Harvard T.H. Chan School of Public Health in cooperation with United Technologies, analyzed how office air quality affects health and productivity. The findings were clear:

• Better air quality (low CO₂, VOC, and particulate levels) boosted cognitive performance by up to 61%.
• Sustainable building designs reduced sick days and absenteeism.
• Employees reported improved wellbeing, concentration, and sleep quality.

These findings underpin certification requirements like LEED, BREEAM, and WELL Building Standard, all of which highlight air quality as a key performance indicator. Ventilation systems based on variable airflow (VAV) and responsive to CO₂, occupancy, or humidity are not just technical solutions—they’re essential tools for meeting ESG goals and achieving international building standards.