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A small wobble isn’t worrisome, especially when you’re using your fan at top speed, but a significant one is. Ball joint fans, which are used on sloped ceilings, are more likely to wobble than a standard fan based on their design. But even then, you shouldn’t see significant wobbling, as this can be a sign of a bad installation.

Most duct booster fans are not designed to run continuously, though some models can be programmed for constant operation. Typically, they are controlled by the user via a switch, controls on the unit itself, or by being wired to the HVAC system's thermostat. Wiring the fan to a thermostat allows it to run automatically only when heating or cooling is active, which saves energy and is an effective way to activate the fan only when needed to address issues like uneven room temperatures.

Regularly clean fan grilles, check for dust buildup, and ensure proper venting to prevent mold growth.

Most people describe the sound of an unbalanced ceiling fan as a buzzing or grinding noise. This is caused by the parts of the fan rubbing or rattling against each other as the blades spin. However, a wobbling fan can also make squeaking, rattling, or thumping sounds, depending on the severity of the balance issue.