If you are on the lookout for a new exhaust fan for your bathroom or kitchen, then consider the Crompton Greaves Driftair exhaust fan. This three-blade exhaust fan is made of metal, thereby making it completely rust-proof. The fan, from the house of Crompton Greaves, is Ideal for Mounting on Glass Windows. This exhaust fan is perfect for mounting on the glass windows. It is lightweight, and the glass can take the weight of the fan.