It is a matter of opinions what decor goes well with the fan. Some of the decor that can look nice with the fan can be fountains with falling water or mirrors.
There is not enough information to answer this question.
Because hot air goes up, in a house ask of the hot air is going to accumulate at the ceiling and when the ceiling fans go backward in the winter its to push the hot air down so that hot air is moving around the house keeping us warm in winter.
If what you are referring, is the blue Neutral wire in the UK/Ireland, it eventually connects to ground or earth potential at some point on its way to the power station. It is usually at or near zero volts potential but may not always be so.
Not all fans do that. Some are also reversible. Also the direction of turning is opposite if you observe from the opposite side.A bit more:On ceiling fans, they are made to be reversed for a reason, so the blades can either pull the air up or push it down. For example, on mine, with the way the blades are tilted, when it goes clockwise, it pulls the air up, pulling the warmer air upwards. When I flip the switch to reverse the direction to counter clockwise, the blades push the air downwards.For home ceiling fans, the air should be moving down in the summer time. In the winter time when the home heating unit is being used, the air should be drawn up to the ceiling. This causes a flow pattern that circulates up through the fan to the ceiling, across the ceiling and down the walls to the floor where it gets drawn back up to the ceiling. This rotational pattern draws the warm air from the ceiling and redistributes it to the floor where you can sense the warmth.
I've never heard of a DC ceiling fan, but.. AC-Alternating current. Electricity flows through a circuit in one direction, then changes direction and goes back the other way. This happens 60 times per second in the US. (60Hz) The US power distribution system is AC. DC-Direct Current. Electricity flows through a circuit in only one direction continuously. Batteries powering a flashlight, for example, are DC. Well, all batteries are DC. Like I said, I've never heard of a DC ceiling fan, but the DC fan's motor is designed to run on DC (such as batteries) only, and the AC fan motor is designed to run on AC only. I have heard however of a solar powered attic ventilator, which would be a DC fan. If there is a DC ceiling fan, however, keep in mind it needs a power source, and you won't be able to hook it up to the electrical box in the ceiling. That box is AC. The power source for a DC ceiling fan is likely replaceable batteries or solar cells, neither of which will make for a very robust fan.
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