How the motors differ
AC (alternating current) motors run directly on household power and have been the standard for decades. DC (direct current) motors use a small electronic converter to run the motor with permanent magnets. The result is a smaller, lighter motor that uses less power and can be controlled more precisely.
Comparison
| Feature | AC motor | DC motor |
|---|---|---|
| Energy use | Higher | Lower; manufacturers commonly cite up to about 70% less |
| Noise | Can hum at lower speeds | Very quiet |
| Speeds | Usually 3 | Often 5 to 9 |
| Controls | Pull chain, wall control, remote | Remote or app, often required |
| Reverse | Switch on the motor | By remote |
| Price | Lower | Higher |
| Weight | Heavier | Lighter |
When a DC fan is worth it
- The fan will run many hours, such as in a bedroom or on a patio
- You are sensitive to noise
- You want precise speeds and a remote or app
- You want a large fan that is light on power
When an AC fan is fine
- A guest room or rarely used space
- Budget projects and rental properties
- You want to use a standard wall control
Controls and compatibility
DC fans generally need the manufacturer's remote or a compatible control. A standard wall switch will still turn the fan on and off, but a dimmer or speed control designed for AC fans can damage a DC fan. We match the control to the motor on every job. See remote and wall control installation.
Should you replace an AC fan with a DC fan?
If your current fan is noisy, wobbly or has a failing capacitor, a DC fan is usually a good replacement. See ceiling fan replacement.
Frequently asked questions
Are DC ceiling fans quieter?
Yes. DC motors run more smoothly and are often nearly silent.
Do DC fans always need a remote?
Most do, since the electronic controller is built into the fan.
Can I use a dimmer on a DC fan?
No. Use only the manufacturer's remote or a compatible control.
Keep reading
How Ceiling Fans Can Lower Your AC Bill in an Arizona Summer
Ceiling fans cool people, not rooms. Learn how they let you raise the thermostat, how much power they use and the best ways to use them in an Arizona summer.
How to Choose the Best Ceiling Fan for an Arizona Home
What to look for in a ceiling fan for Arizona heat: DC motor, CFM, blade pitch, size, rating for patios and controls. A buyer's guide from local installers.