Ltpgtthe manrose 120mm extractor fan is designed for larger bathrooms toilets cloakrooms and medium sized rooms the 120mm 5quot series of fans are 56 more powerful than their 100mm 4quot counterparts yet only 10 larger in surface area these fans are double insulated and do not require an earth all wiring must comply with current iee regulations a double pole isolating switch having a contact separation of at least 3mm in all poles must be used with a 3 amp fuse fitted the