No
one component defines the performance of the fan; rather it is the
combination of all of these components that affects how well a fan
works.
Motor
Basically, there are two types of
ceiling fan motors: those with sealed and lubricated ball bearings and
those with bearings that rotate in an oil bath. Lubrication provides
smooth operation and contributes to the longevity of the motor. Motors
with sealed bearings require little or no maintenance whereas motors
with oil baths need occasional service, such as adding oil.
Motor Grade
- Performance Grade
fans — Use larger and more powerful motors that are designed for
continuous use and quiet operation. These are usually the most
expensive models - Medium Grade fans are suitable for operating 12 hours or less per day.
- Moderate or Economy Grade fans work best in a room with 8-foot ceilings, running no more than 8 hours a day. Least are the most inexpensive ceiling fans
Motor Housing
The
housing is the decorative body of the fan that encloses the fan motor.
Fans that use heavier materials, such as die cast metals, for housing
tend to vibrate less, provide more stability for longer downrods, and
provide a good surface for high quality finishes.
Other features that ensure longevity and quiet operation include heavy-duty windings, precision engineering bearings, and shock-absorbent internal components. These features are commonly found in more expensive ceiling fan models.
Blade
- Pitch
is the angle of the fan's blades, and it's measured in degrees. Higher
blade pitches usually move more air, which is given in cubic feet per
minute, or CFM. However, blade pitch alone does not determine air
movement. Other factors such as the motor design and speed, as well as
blade design, material, number, and length can contribute to the amount
of air movement. Higher pitch is NOT always better — some models offer
a higher blade pitch to compensate for a smaller, less efficient motor. - Blades should be sealed from moisture
to prevent warping, bubbling, or peeling. Some manufacturers offer
special coatings on metal finishes to prevent scratches or tarnishing. - High
quality blades are weighed and balanced prior to shipment and come in
factory-matched sets. For this reason, they cannot be switched out with
other fans. For flexibility in design, a number of manufacturers offer
a variety of blade styles and finishes for a particular fan. However,
changing the blade style could affect the performance of the fan.
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