Clockwise
It depends on the pitch of the blades.
fan blades are inclined to an angle of less than 90 degrees. When a fan motor turns the blades, the blades move through the air at an incline; the inclined surface passing through the air pushes the air forward, as the air is scooped up by the leading edge of the fan blade and set in motion as it passes over the surface.
That bend is needed in order to change rotational motion of the blades into the linear motion of moving air.
However the blades are oriented. Look at a ceiling fan, the blades are shaped so that it will blow air down (there's a switch on there to make it spin and suck air up). A windmill is made to spin when wind blows and this rotates the handle on a pump to make water come out of a well.
Clockwise
a fan moves air with fan blades.
a fan moves air with fan blades.
It depends on the pitch of the blades.
Fan speed is the result of the impetus provided by the motor and the drag resulting from pushing the blades through the air. When the air through the fan blades already has velocity, the drag on the blades decreases...the motor power remains the same...so the fan speeds up. Current draw on the motor does not change.
This relates to airflow in each of the fan blades. When the fan blades spin, the blades will catch the air and will start to vibrate as a constant process of being pulled back by the air and the blade's elasticity dragging it back to its previous position.
The blades of the fan have a small angle tilt, so it can push down air.
The electric cooling fan on a 97 Dodge Neon turns the blades in a clockwise rotation. This pulls air through the radiator and across the engine.
Without seeing the unit it`s hard to say with absolute certainty but most are air out.
fan blades are inclined to an angle of less than 90 degrees. When a fan motor turns the blades, the blades move through the air at an incline; the inclined surface passing through the air pushes the air forward, as the air is scooped up by the leading edge of the fan blade and set in motion as it passes over the surface.
I think it is a combination of the fan motor vibrating against the houseing and the air volocity getting pushed across the fan blades
Make sure that there is no cover on the unit outside, check the AIR filter. Make sure it is clean, then go to the thermostat and turn it to cool, fan on auto and turn it down.