User Manual Big Ass Fans B3213-X4-BW-04-02-D-01 84" Haiku Indoor Cocoa Bamboo Ceiling Fan

For decades, people have been told to set their ceiling fans to reverse, or clockwise, in winter to push down the heat that collects at the ceiling. But like many long-held beliefs, this is not exactly true.
As many people have found, traditional flat-bladed fans must be turned on at high speed when in reverse to effectively push warm air down to occupant level. That inevitably creates an uncomfortable draft and uses more energy.
Unlike traditional flat-bladed fans, Big Ass Fans® have been scientifically proven to circulate warm air effectively at a very slow speed in the forward direction. Their aerodynamic airfoils move large amounts of air at slow speeds, achieving a more uniform temperature throughout a space — efficiently, and without the draft. Depending on the ceiling height, HVAC savings can total as high as 25 percent or even greater in industrial and commercial spaces, with savings up to 10 percent the norm in residential settings.

IN THE SUMMER
In the summer, the purpose of a ceiling fan is to enhance cooling by creating a breeze across your skin – this speeds evaporation of moisture on your skin, and it’s that evaporation of moisture that actually creates the cooling effect.
If you have high ceilings, when the fan is first turned on you may feel an increase in temperature as warm air is brought down from under the ceiling. This effect will soon dissipate, and then the cooling effect will begin.
Beyond this, adjust the fan for your comfort: faster if you feel warm, slower if you feel cool (or if papers are flying around the room).
Fans do not cool the air in a room. Therefore, there is no benefit in leaving a fan running when there are no people in the room; this just wastes electricity. The cooling effect of a fan takes place only when the moving air encounters a person’s skin.
Haiku’s “Smarter Cooling” setting takes care of this automatically. Big Ass Fans equipped with SmartSense technology also take the guesswork out of the process.
IN THE WINTER
In the winter, you don’t want to feel the cooling effect of a breeze across your skin. Therefore, the fan should run very slowly.
If you have high ceilings, operate the ceiling fan at its lowest possible speed to bring the warm air trapped at the ceiling down to occupant level.
If your fan can run slowly enough to not create a breeze at its lowest speed setting, it is most efficient and most effective to operate the fan in its “forward” position (blowing downward). This is true of all Big Ass Fans across our industrial, commercial and residential lines.
If you continue to feel a breeze at the lowest setting, you can still benefit by operating the fan only when there are no people in the room to feel the draft.
Haiku’s “Smarter Heating” setting takes care of this automatically, as does SmartSense technology on Big Ass industrial fans.

There are some basic rules of thumb for determining the right size ceiling fan for a given space, although lots of variables must also be considered. Rarely is a space wide open, without dividers, racking, furniture or other obstructions. However, the following guidelines are a good place to start:

For most industrial and commercial large-diameter ceiling fans:

The square footage of the space in which a fan is going should be 5-7 times the diameter of the fan. In other words, a 14-ft fan (measured from tip to tip at its widest point) would cover an area of at least 4,900 square feet. (That’s 5×14=70; 70×70=4,900.) The largest industrial ceiling fan made is 24 feet tip to tip; it would cover approximately 14,400 square feet. (24tx5=120×120=14,400.)
The fan tips must be 2 feet away from any ceiling obstructions or features, such as lights, trusses, beams or disco balls.
There should be enough distance between the ceiling and the fan that the fan doesn’t “suffocate” and has adequate space above it. This is generally 5-7 feet from the ceiling, depending on the fan’s diameter.
The fan should spin from 10 to 24 feet from the ground — often this recommendation is stated as the fan should spin its diameter above the floor.