2006-06-19 20:33:52 · 11 answers · asked by amrita_dinakar 1 in Science & Mathematics ➔ Engineering
Exhaust fans are used to remove heat and/or moisture from an area. Heat should be exhausted only when cooler air can be drawn in. Tilted baldes help in doing both suction of outer air and removal of hot air.
2006-06-19 20:44:21 · answer #1 · answered by viper4in 3 · 0⤊ 1⤋
The velocity of the air being moved is determined by the diameter of the blade, speed of the blade and angle (pitch) of the blade. The fan and motor combination is designed to move the desired amount of air efficiently. Ceiling fans circulate room air creating a pleasant breeze at relatively slow speeds. Exhaust fans are needed to replace all the air in a given room at a desired rate using relatively small air ducts and must move the air at a rapid velocity. If ceiling fans rotated too fast they would endanger anyone who could reach them with a hand or other object. Exhaust fans (within ducts or in a windor have smaller diameters and need more pitch and speed but are provided with protection to avoid contact.
2006-06-20 05:37:54 · answer #2 · answered by Kes 7 · 0⤊ 0⤋
The Purpose of the two type of Fan differs slightly.
Although both are design to move air generally, they are optimised for different purposes,
Exhaust Fan blade, in an apple to apple comparing, creates less turbulence flow as compare with the ceiling fan blade.
Exhaust Fan, are design to draw air to or from some target . Blade is design to help to draw air. and the "Tunnel" which the fan is placed in, improve the efficiency.
Celing fan, tend to circulate air within a room. The Blades, draws air, similarly to the exhaust fan, but the tips of the blade, created eddies, that increase the turbulence flow .
Read the link for more details on Propeller:
2006-06-19 23:30:16 · answer #3 · answered by Mac C 3 · 0⤊ 0⤋
Your Q is the the angle of blade of exhaust fan is more than Ceiling fan.
a. Volume of air transfered is totally depending on the angle of blade and the rotating speed.
b. Exhaust fans normaly designed to transfer higher volume of air through small area of discharge and the ceiling fan for lesser volume in open area.
c. In both case operation is same but designed to function differently.
So this is a matter of design for the purpose and nothingelse.
Good luck
c.
2006-06-20 05:42:01 · answer #4 · answered by Wowpra 2 · 0⤊ 0⤋
An exhaust fan is designed to move more air through a smaller hole at a faster rate. The sharper tilt in the blades facilitates this.
2006-06-19 20:36:20 · answer #5 · answered by Joe K 6 · 0⤊ 0⤋
the exhaust fans are tilted more than a ceiling fan due to the amount of a compound being exhaled in a ceiling fan spins the air around to cool
2006-06-19 20:37:24 · answer #6 · answered by cindy_constable 1 · 0⤊ 0⤋
the name tells u all !! the exhaust fan in used to absorb air and send it outside, but the ceiling fans produces air and circulates it. if u were to exchange the blades, guess what..........
the functioning of the fan is determined by the material used and the tilt angle.
2006-06-19 20:41:05 · answer #7 · answered by praveen 2 · 0⤊ 0⤋
If you heat source is coming from your ceiling then leave your ceiling fan set like you would during summer time use. It will force the warm air downwards from the ceiling towards the floor. If your heat source were anywhere else but the ceiling, it would be the reverse. I'm absolutely amazed that the majority of answers you got here are clueless....Warm air rises so if you fan doesn't force the warm air downwards..You'll never get any heat at all......... vinnie00 Thumbs Up Bud!
2016-03-26 22:30:00 · answer #8 · answered by ? 4 · 0⤊ 0⤋
more air sucking power, faster friction ability. You don't wna ttyou ceilign fan to suck stuff in! Or blow you room apart either.
2006-06-19 20:36:58 · answer #9 · answered by Anonymous · 0⤊ 0⤋
to cover less space
2006-06-19 20:37:39 · answer #10 · answered by nil d 3 · 0⤊ 0⤋