Ensuring Clean Air for Children: ASPRA INduct at KNOTZ Kinderopvang
Reducing Indoor Air Pollution in Childcare & Schools with ASPRA INduct
Childcare centers and schools often struggle with poor indoor air quality, as their ventilation relies on natural airflow, infiltration, and recirculation without effective filtration. This results in higher and prolonged peaks of outdoor pollutants indoors, increasing the risk of respiratory issues in children.
To combat this issue, KNOTZ Kinderopvang implemented ASPRA INduct, integrating it with their AHU, fan coil, and recirculation system. The results were striking—85% reduction in airborne particles compared to outdoor air and an 80% reduction compared to a reference classroom. This intervention ensures a safer, healthier indoor environment for children and staff.

About the Project
In childcare centers and schools, maintaining clean indoor air is essential for the health and well-being of children and staff. However, many educational facilities rely on natural airflow and infiltration without proper filtration, allowing harmful outdoor pollutants to persist indoors for long durations.
To address this challenge, KNOTZ Kinderopvang partnered with VFA Solutions to install ASPRA INduct. By connecting ASPRA INduct to the existing AHU, fan coil, and recirculation system, the facility significantly reduced indoor air pollution, ensuring healthy, particle-free air for students and teachers.
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Summary
1. Problem
Poor air filtration in childcare and schools, leading to higher indoor pollution peaks that last longer than outdoor pollution spikes.
2. Solution
Integration of ASPRA INduct with the AHU, fan coil, and recirculation system to filter and purify indoor air.
3. Result
85% reduction in airborne particles compared to outdoor air and 80% reduction compared to a reference classroom.
Highlights
85% reduction in indoor airborne particles compared to outdoor air.
80% lower pollution levels than a reference classroom.
Improved indoor air quality for children and staff.
Seamless integration with existing ventilation systems.
Detailed Approach

Problem Description
Many childcare centers and schools rely on natural ventilation and recirculation systems that lack proper air filtration. As a result, outdoor pollution peaks directly impact indoor air quality, leading to higher and longer-lasting airborne particle concentrations inside classrooms.
This situation can cause respiratory issues, allergies, and discomfort for children and staff. Without effective filtration, educational facilities remain vulnerable to harmful ultrafine particles (UFPs) and aerosols circulating in the air.
The Solution
To create a cleaner and healthier learning environment, KNOTZ Kinderopvang implemented ASPRA INduct by integrating it with the facility’s AHU, fan coil, and recirculation system. This technology ensures that inlet air is particle-free, preventing indoor air pollution spikes caused by outdoor contaminants.
By efficiently removing airborne particles, including ultrafine particles (UFPs), ASPRA INduct helps to maintain a stable, clean indoor air environment, ensuring that students and teachers can breathe safely while reducing health risks.


The Result
Following the installation of ASPRA INduct, indoor air quality dramatically improved. Measurements showed an 85% reduction in airborne particles compared to outdoor levels and an 80% decrease compared to a reference classroom.
By effectively filtering particles from ventilation air, ASPRA INduct has helped KNOTZ Kinderopvang create a healthier, safer indoor space for children, proving that proper filtration is essential for reducing indoor aerosol exposure in schools and daycare centers.
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