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March 24, 2025

Humidity control: Air Sponge test with CAPSA

Discover our test in real conditions with CAPSA to control humidity in containers using Air Sponge dehumidifier tape.

Context of experimentation in containers

After convincing results in a climate chamber, So Sponge conducted a field experiment in partnership with the company CAPSA, a specialist in the design, transformation and layout of maritime containers to create modular and sustainable spaces for professional or event use.

We used two 10-foot containers, not thermally insulated, to test the effectiveness of the Air Sponge moisture absorbent tape.

Test protocol for measuring humidity

1. Selecting containers and installing sensors

Two identical containers were equipped with humidity sensors and temperature (of type professional humidity tester) in order to ensure rigorous follow-up.

2. Preliminary phase

For 3 days, measurements of temperature andRelative humidity were carried out in empty containers, in order to ensure that the two containers reacted in the same way, without external influence.

3. Add the Air Sponge ribbon

After validation, a dimensioned ribbon was installed in one of the two containers. Surveys were then carried out for several months to observe its effect onAmbient humidity.

Results: effectiveness of the tape against condensation

A common occurrence: container rain

The readings show typical behavior:

  • The day, the Temperature is rising, the humidity decreases.

  • At night, the temperature drops and humidity increases strongly.

If the increase is too large (> 90%), there is a risk of condensation, which is called “container rain” (see photo below).

Une image contenant bâtiment, ligne, fenêtre, storeLe contenu généré par l’IA peut être incorrect.

Air Sponge: a durable absorbent fabric

The curve below compares the humidity levels in the 2 containers over several days.

It is observed that the Air Sponge fabric makes it possible to limit the humidity level in the container (< 80%), which protects it from condensation.

It is also observed that the tissue regenerates spontaneously during the day: it maintains its effectiveness over time. We left the Air Sponge tape in the container for almost 1 year without seeing any deterioration in performance.

Conclusion & thanks

Une image contenant personne, Visage humain, sourire, cielLe contenu généré par l’IA peut être incorrect.

Ce humidity control test confirmed the interest of the Air Sponge in a real environment. Thanks to CAPSA for their trust and the provision of containers.

JJ

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