* Window Mount Range – Round Type is designed for direct exhaust to outdoor to maintain the best indoor ventilation and air circulation. 
* The fans are recommended for domestic and commercial premises, e.g. bathroom, bedroom, living room, kitchen, lavatory, meeting room, office, computer room, restaurant, classroom, hospital ward, etc.
* Durable and reliable Shaded Pole Motor is adopted.
* Safety Blade Holding Cap for tightening blade position.  Detachable for convenience of blade cleaning.
* Reliable Pullcord Shutter & Switch ensure the best contact between the switch and the back cover : (HAE2-15C, HAE2-20C : pillar switch / HAE3-15C, HAE3-20C : terminal switch )
* Pullcord Cabinet is designed for tidy storage of pullcord (HAE3-15C, HAE3-20C) 
* Vibration Proof Cushion is included.