An Air extractor makes the air circulate so that the plants breath better and grow better.

We advice to use an ectractor powerful enough to extract 30-40 times the volume of the grow room, for very small space ( 400W 2m³
) multiply the volume by 75.
If you wish to use a carbon filter, multiply by 1.3

Use 100mm pipe for the 160m3 and the 125mm for the 225m3 extrator.