Lasko 20" Wind Machine is the quietest box fan for sleeping.

For sleeping quietly, the Lasko 20" Wind Machine (#3733) is your best bet among box fans. On low, it’s a consistent, smooth white noise without the rattles and motor hum that plague cheap $15 fans.

Most box fans under $30 sound like a lawnmower engine because they use cheap sleeve bearings that wobble and vibrate. The Lasko Wind Machine uses a different motor design that runs smoother, especially on the lower settings. It’s still a fan — you’ll hear air