Ltpgtdx100ts 4quot 100mm extractor fan with a built in over run timer to continue the extraction of moisture and odours after the unit is switched off users can adjust the dx100ts timer fan to their preference at installation from 2 to 20 minutes ltbr gtltbr gta comprehensive range of stylish compact and easy to install 100mm 4quot single speed extractor fans suitable for a wide range of applications including bathrooms shower rooms and toilets including zones 1 and 2