As more and more people are becoming energy conscience we need to evaluate ways to save. Using a ceiling fan regardless of the motor will help you save on central air conditioning costs. In the summer months when you turn on the ceiling fan you can raise the temperature on your thermostat and ultimately you will have less energy costs because your central air won't have too work as hard to cool off the space. The original ceiling fan was created with a stream of water and a turbine engine to rotate belts that would turn a ceiling fan. In 1882 Philip Diehl engineered a Singer Sewing Machine Motor to run a ceiling fan and over time it has developed into the ceiling fan as we know it. Every year, engineers develop and tweak the motors hoping to make them more efficient. Choosing a good looking or interesting ceiling fan can be difficult and it becomes more difficult when deciding between an Alternating Current (AC Motor) and a Direct Current (DC Motor).
Alternating Current Motors (AC)
The electricity that is sent from the power plant to the wall sockets in our homes is on an Alternating Current. Alternating Current power reverses direction 60 times per second in the US and can travel long distances and the voltage can easily be converted with a transformer stations. The AC Ceiling Fan is the most affordable ceiling fan available on the market because it doesn't need a self contained transformer in order to operate. If you care about the looks of your ceiling fan and how it coordinates with the space there are a lot of great looking AC Ceiling Fans to choose from. A major advantage of the AC Motor is that it is fully compatible with the whole house control systems such as Savant, Lutron, Crestron, etc. However, the AC Ceiling Fan uses more energy, has shorter motor life, and is noisier than the DC Ceiling Fan.
Direct Current Motors (DC) with an Alternating Current Supply. Also known as (EC)
Batteries, fuel cells and solar cells all produce a Direct Current (DC). Direct Current always flows in the same direction between those two positive and negative terminals. Most standard ceiling fans require constant power to keep the fan spinning, a DC motor only needs to get the fan up to speed then a built in magnetic drive keeps the fan circulating using 3 to 5 times less energy consumption. Not only do DC motors run faster with less energy, but they run quieter because it doesn't create wave noise produced by the influx and deflux of current. Since DC motors use less energy they run cooler have a longer motor life. One of the downsides to the DC motor fans is the lack on consistency and adaptation to the whole house control systems such as Savant, Lutron, Crestron, etc. Please check with your Electrical Engineer prior to purchasing a DC Motor Ceiling Fan if you are using one of these systems. Currently DC Motor Ceiling Fans have a lack of design options and choices with exterior and damp location ceiling fans and they are more expensive because it has a built-in transformer. In the next few years this will become less of an issue and we will begin to see more design options.