The curve of forward curved centrifugal blowers faces toward the direction of the rotation of the impeller. The blades' length is shorter than radial and backward curved blades. The force of the air placed on the blades is in the direction of the bend of the blades, which can only be achieved with the shorter blades. The velocity vector VR of forward curved blades is greater for forward curved blades compared to radial and backward blades. Forward curved blades create the highest pressure but are the least efficient. A forward curved centrifugal fan is also known as a squirrel cage blower because the blower wheel is shaped like a squirrel cage wheel. Its structure includes an impeller, shaft, bearings, and housing. Forward curved centrifugal blowers are ideal for domestic furnaces and air conditioning units.