Fans
Axial Fan
Axial fans are suitable for large quantity of air at low pressure while producing low noise.
Belt driven axial fans are used in a situations where it is important that the motor is kept out of the airstream owing to type or temperature of the gases/fumes involved.
Accessibility of motor for easy maintenance is the additional advantage.
Up Blast Fan
A upblast fan exhausts or blows air up and away from the fan. A direct drive upblast fan is powered by a motor that is connected to a fan.
Upblast fans have a sealed motor compartment to protect the motor from heat, grease, and moisture. They are easy to maintain and clean.
They are of two types :
A direct drive upblast fan, and a belt driven upblast fan.
Down Blast Fan
A downblast fan blows air back down towards the fan base after pulling it through the duct work.
Downblast fans does not have a sealed motor compartment to protect the motor. Downblast fans pull air from outside into the room to fill it with fresher, cooler air for improved air quality and helps with air circulation.
A good downblast roof fan can keep a steady flow of fresh and temperature-controlled air into the room. Consequently, air conditioner will work less, and overall energy usage will be lower since the temperature will be more evenly distributed.
Centrifugal Fan
A centrifugal fan also called as centrifugal blower is a pump or motor that moves air. It pulls the air inside the blower and then pushes it out a 90º angle.
The two main components are the motor and the impeller.
An impeller sucks or pulls the air, in contrast to a propeller which pushes air.
Square In-Line Fan
