The Fan 1500 DH is equipped with a humidity sensor that can be set between 40 and 90% relative humidity. The fan automatically turns on as soon as the humidity exceeds the set threshold. This adds comfort and helps prevent mold formation in the bathroom. You can easily turn the fan on and off at any time using the bathroom light switch. Additionally, by setting it once, you can specify a run-on time, allowing the fan to continue running for up to 30 minutes after the bathroom light is turned off before it automatically shuts off. The fan features a modern Bosch design with an easy-to-clean plastic front, making it a perfect match for any bathroom decor.