Okay - that sounds a little odd ... surely the landlord (are you renting?) has responsibility to provide approved and safe dwelling? If you own, then your local council will check, and help rectify potentially unsafe wiring. Put simply, the Earth is there just to protect you from being shocked if the casing of the fixture should become live. That's why the green/Earth usually attaches to the light fitting, and not to the light itself. To answer your questions: 1. You can install it. It's a little dangerous, but how low is the ceiling? If it's way high and unlikely to be accidentally touched, then no real issue. Also if the casing is plastic, not metal, you'd be safer. But I guess the fan veins are metal(?) 2. You can make an earth by running an earth wire to the fitting from any other Earthed location. Typically all the metal fittings in the bathroom will be Earthed - so radiators / pipes / bath / shower. If you have access to enough of the ceiling spaces to run that wire, you can make an Earth. How easy depends on the construction of the ceilings and the layout of the apartment. Personally, I'd just install without an Earth. If you install it correctly, there's little chance of you needing the 'back-up' of the Earth connection.