Displacement ventilation system
Displacement ventilation is an innovative ventilation technique increasingly used to improve the indoor environment in large spaces. This method is distinguished by distributing air at floor level at low velocity, providing efficient air refreshment and a pleasant, healthy working environment. Unlike traditional mixing ventilation, where air is blown into the room at higher velocities, displacement ventilation operates with a subtle, sustained flow of air that removes contaminants and heat to the ceiling. This technique has proven particularly effective in large halls, industrial environments and even public spaces such as airports.
Vertical Displacement Ventilation (System V)
Using vertical displacement ventilation, fresh air is blown into the room through a raised, perforated floor. This airflow then moves straight up toward the ceiling, where the used air is efficiently exhausted through slots in the suspended ceiling. No student is skipped when ventilating. This has the main benefit of reducing aerosol exposure by 98%.
This method ensures that the air you breathe does not circulate past others, which reduces the
significantly limits aerosol dispersion. TNO research shows that these
approach reduces aerosol exposure by as much as 98%. An added benefit is that the room is efficiently heated.
- Highest air quality
- Highest energy efficiency
- Lowest exposure to aerosols
- Lowest maintenance cost
Here's why!
First conclusions and observations:
- The average gas consumption decreases from approximately 10 m³ to approximately 4 m³ of natural gas per m² GFA (gross floor area) without any modifications to the building's envelope.
- Average CO2 levels during classroom hours remain below the promised 700 ppm.
- Average particulate matter concentrations also remain below the promised 3 µg/m³.
- A Goflow floor is always cleaner than a traditional floor.
Schools and classrooms
Displacement ventilation provides a healthy indoor environment with low pollution levels, which is especially beneficial in classrooms and educational institutions.
Best for health
TNO research shows that Goflow classrooms contain 97% less aerosols, improving learning performance and reducing teacher absenteeism by 90%.
How does displacement ventilation work?
In displacement ventilation, cooled, clean air with a temperature slightly lower than the room temperature is directed into the room from the floor. Heat sources such as machinery and people cause the cooler air to rise by convection currents. This creates a natural air movement that pushes contaminated and heated air to the ceiling, where it is then extracted. This creates a layered system, with the lower zone containing clean and cool air, while polluted air is exhausted at the top.
Horizontal Displacement Ventilation (System H)
In horizontal displacement ventilation, filtered clean outside air is conditioned and evenly blown into the side of the classroom. This air flows horizontally through the classroom and is exhausted at the center of the system ceiling.
This method of ventilation provides a low-level way to significantly reduce the
exposure to aerosols significantly reduced without replacing the floor.
- Low-level installation
- 50% less exposure compared to traditional mixing ventilation.
- Fresh Schools class A+
System comparison
Each of these systems has unique characteristics that affect air quality, energy efficiency and installation requirements within a building. The table below provides an overview of each system.
| System V | System H | |
|---|---|---|
|
Operating principle |
Vertical displacement |
Horizontal displacement |
|
Fresh Schools class |
A++ |
A+ |
|
CO2 |
97% |
53% |
|
Particulate matter (PM2.5) |
< 300 ppm t.o.v. buitenlucht |
< 350 ppm t.o.v. buitenlucht |
|
Sound level |
30 dB(A) |
33 dB(A) |
|
Adaptation to the classroom |
System ceiling & system floor |
System ceiling |
Frequently Asked Questions
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Displacement ventilation is a ventilation system that brings clean, cooled air into the room through the floor. This system is designed to move contaminants and heat upward and dissipate them.
Displacement ventilation is often used in large spaces such as factories, airports, offices and schools because of its high efficiency and energy efficiency.
Benefits include increased energy efficiency, a healthier indoor environment, optimal cooling capacity and low air velocities in the occupied zone.
Yes, displacement ventilation can be easily integrated with heating and cooling systems to ensure an optimal indoor environment.
Experience it
Wondering what the cleanest classroom feels like? Sign up and visit our Goflow Experience classroom in Sassenheim!
