• Anchor bajaj CG Khaitan Havells Lazer India Ortem Orient Polar Usha
  • Anchorbajaj CG Khaitan Havells Lazer India Ortem Orient Polar Usha
 
 
 
 
 
 
 
 
Frequently Asked Questions

Ceiling fans :

Q1. What should be the height of the ceiling fans from the floor?
A1. Minimum distance between ceiling fan &floor should be2.3 mtrs (approx 7.5 ft)
   
Q2. What should be the distance between ceiling & ceiling fan?
A2. Minimum distance between ceiling or a projecting beam & ceiling fan blades should be 0.25 mtrs(approx 9.5inches)
   
Q3. What should be the distance between ceiling fan & nearest wall?
A3. Horizontal distance between ceiling fan blade tip & nearest wall should be 0.5 times the fan size.
   
Q4. What should be the clearance between two nearest fans ,if more than one fan are required in a hall?
A4. Minimum clearance between two consecutive fan hooks should be twice the fan size to be fitted.
   
Q5. What is fan size?
A5. Fan size is the diameter of the circle traced out by the extreme tips of the fan blades, while rotating.
   
Q6. What are the standard sizes?
A6. Standard sizes available in the market are 600mm, 750mm, 900mm, 1050mm, 1200mm, 1400mm, 1500mm.
   
Q7. What is the air delivery?
A7. Air delivery is the volume of air swept out by the ceiling fan under test conditions as prescribed in IS-374.
   
Q8. What is the efficiency of the ceiling fan?
A8. Efficiency of the ceiling fan is a ratio of air delivered by fan in cubic mtrs per minute &electrical power inputs in watts,when fan is operated at rated voltage.(this is known as the service value of the fan) Efficiency or service value is the air delivery per unit of power consumed and expressed as CMM/Watt or CFM/Watt.
   
Q9. What is rated voltage?
A9. Rated voltage is the voltage written on the rating plate of the fan. (and is normally equal to the supply voltage available in the house)
   
Q10. Why all ceiling fans have three blades ?
A10. Minimum three blades are reuired to take care of uniform air-flow and aesthetics simultaneously. 3 blades are the most dynamically balanced configuration.
   
Q11. Does four blade fan have more air delivery than three blades ?
A11. For some makes of fan it is more, for others it is same as three blade fans.
   
Q12. Does wider blade contribute to more air delivery ?
A12. Not necessarily.
   
Q13. Does a fan consume same power at all speed-positions ?
A13. No, at low speeds total power consumed by the fan (including the power consumed by the regulator) is lower than that at high speeds.
   
Q14. Does change of capacitor to higher value improve the performance of the fan ?
A14. It may increase the speed marginally, however power consumption also goes up resulting in reduced efficiency and reduced motor life. At lower supply voltage, the effect of higher capacitor value can be more to increase the speed
   
Q15. It is not advisible to use electronic controller available in market (unless the fan manufacturer recommends to do so) as majority of them generate humming noise in the fan at low speeds. It also affects the life of a capacitor in the fan.
   
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Table, Pedestal, Wall Fans :

Q1. Does four blade table fan give more air than a three blade fan ?
A1. Not necessarily (In fact the air deliveries of table fans can be perceived at the sales counter)
   
Q2. Do Table, Wall & Pedestal Fans require frequent lubrication ?
A2. Almost all fans use bush-bearings which need lubrication. The manufacturer gives details of type and quantity of lubricants to be use.
   
Q3. Is a plastic fan less durable than metal fan?
A3. No.
   
Q4. What are the specific benefits of TPW fans over ceiling fans ?
A4. TPW fans give higher air velocity as it is perceived & felt close to the fan compared to ceiling fans. This gives more relief and comfort in summer. Portability of TPW fans is the added advantage. They cover larger area due to swing by oscillating mechanism and also have advantage of personalized fans in non-oscillating mode.
   
Q5. Why there are only three speeds for TPW fans while ceiling fans have five ?
A5. All fan manufacturers follow relevant Indian standards for basic constructions and test procedures of the fans. IS stipulates three speeds for TPW fans.

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