Power Consumption Compared

AC ceiling fans accept been around for well-nigh a century. The fact that they are yet beingness installed inwards homes despite the invention too improvement of air conditioners in addition to HVAC systems, shows that they are nevertheless a valuable too effective device. Yet, they may in conclusion live in danger of being replaced by the newest development inward ceiling fan pattern in addition to engineering.

Ceiling fans are forthwith beingness sold amongst DC motors, which make them more energy-efficient, compact, together with quieter. However, the upfront toll is generally much higher for DC fans than it is for air-conditioning fans. So, what are the ability consumption comparisons, together with does saving on running costs cover the purchase cost of the DC fans?

DC ceiling fans function upwards to seventy% less ability than AC ceiling fans because they function with straight current as well as as well accept a magnet system to assist rotor drive.

DC Fans Use Less Power

DC fans to consume upward to lxx% less power than an AC fan.

Average Power Consumption of an AC and DC Ceiling Fans based on airflow, size and speed

Average Power Consumption Based on Airflow

Airflow (CFM)	Low (0–5000 CFM)	Medium (5000–6000 CFM)	High (6000 or more CFM)
Power consumption of AC ceiling fan (W)	36	49	55
Power consumption of DC ceiling fan (due west)	18.five	23	xx

Average Power Consumption Based on Size

Size	Small (xx”– 40”)	Medium (41”–52”)	Large (53” or more than)
Power consumption of air-conditioning ceiling fan (W)	29	46	55
Power consumption of DC ceiling fan (west)	23	23	20

Average Power Consumption Based on Speed

Speed	Lowest speed	Highest speed
Power consumption of air conditioning ceiling fan (west)	x	70
Power consumption of DC ceiling fan (W)	three	23

Why Do DC Fans Consume Less Power?

Alternating current apace changes management piece it flows. This results inwards free energy loss. Because DC motors use straight electric current rather than alternating electric current, less free energy is lost too more of what is supplied is available to live converted into function (power).

In addition, the rotor of DC fans utilizes magnets of opposite polarity to back up the motor-driven blade rotation. These magnets are positioned so that the natural attraction between the magnets pulls the blades inward a specific management without the input of power (or at least alongside only a modest input of ability).

What Can Increase Ceiling Fan Power Consumption?

Ultimately, a ceiling fan volition consume more power if the motor works harder as well as this is true regardless of whether the fan has an air conditioning motor or a DC motor. There are a number of factors influencing how hard the ceiling fan works.

Ceiling fans in addition to their support features are designed to agree the weight of the ceiling fan together with the motor is sized to ability a fan of this weight. Any additional weight, specially to the blades, will pose strain on the motor because it has to operate harder to make blade rotation. To see the increased workload, the fan must pull more than power.

Even if you lot aren’t hanging items on your ceiling fan, something like upgrading your blades in addition to non matching the length too weight of the previous blades tin make the motor operate harder in addition to depict more ability.

Drag or resistance can make a fan work harder because the motor has to expend free energy overcoming the resistance or drag before the free energy tin can be used to create rotation. It besides takes more than free energy to hold a constant speed nether these weather condition. You make resistance if yous do things like change the size of the blades or increase their pitch.

Regularly running a ceiling fan all twenty-four hour period too night will place the motor under undue stress. Ceiling fans are designed to operate for long periods of time, but closer to overnight than to a total 24 hours each solar day during the summer.

The more than yous use a ceiling fan, the more habiliment together with tear it experiences. As motors as well as moving parts vesture out, they part less effectively together with depict more power to keep part. Even if yous used your ceiling fan as per the instructions, if it is getting to the terminate of its life, it will besides consume more free energy.

It is of import to note that a ceiling fan motor tin withstand close to rut, simply they are capable of overheating from likewise much stress.

air conditioning vs DC Ceiling Fans: Efficiency Compared

Power consumption is not the entirely element y'all should live looking at. The efficiency of a ceiling fan is also critical to its running costs and touch on the planet.

Because the rotation of ceiling fan blades is what determines the sum of airflow created, if the lower ability consumption of DC ceiling fans does non interpret into less airflow, and so DC ceiling fans are more efficient.

It turns out that this is the example. In addition to consuming less ability, DC ceiling fans are more efficient than AC ceiling fans, using the smaller wattage to create equal or greater airflow. Ceiling fan efficiency is measured in CFM/west.

The average air-conditioning ceiling fan has an efficiency of about 75 CFM/due west. The average DC ceiling fan has an efficiency of about 200 CFM/W. This is more than two times the average of an AC ceiling fan.