The product is very quiet, the humidity setting is very simple. It was a very large room> 60 m², I filled every 2 days 5L container with a central heating and we get to keep humidity> 50%. Only the green color is reported. For meillleure efficiency it is advisable to put at height eg 1.5 m or we can have the puddle phenomenon under the machine when it is put to full power. That said full power is useless