Isobooster and the Coandă effect

the coanda effect

The Coanda effect is a phenomenon discovered by physicist Henri Coanda. In buildings, the Coanda effect ensures that the insulating effect of Isobooster is further enhanced.


In the early 20th century, physicist Henri Coandă discovered that hot, rising air always moves upwards along surfaces (e.g. cold outer walls): the Coandă effect . As air flows from apertures at a certain distance or angle from/to a surface, the induced turbulence and low pressure on one side then draws the airflow to the wall, making it ‘stick’ to it, as long as certain ratios (distances and flow) are maintained. As a result, a continuous air flow is created along the surface. This ensures that the reflection of the heat continues to take place constantly and therefore a layer of dry air is constantly created along the wall. The resulting repetitive reflection of thermal infrared ensures that much more moisture evaporates than would otherwise be the case.


Provided the water vapor is properly discharged, dry air is created. Water vapor is drained off through the cavity. This reduces the relative humidity, which results in a better indoor climate. The material (stone, wood or plaster) also becomes drier. Dry materials absorb heat better and release heat more slowly (compare the stove).


The Coandă effect creates an airflow which then leads to a continuous repetition of the ‘Isobooster effect’.


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