Lasko B20201 20-Inch Box Fan vs Lasko Weather-Shield 3720 Box Fan

Both are 20-inch Lasko box fans with three speeds, and both hold a 4.2 rating. The B20201 is the lighter, simpler pick: 7.25 lb, 1820 CFM, steel body, a carry handle and slip-resistant feet, and it is the one most owners describe as a plain, reliable room mover. The 3720 Weather-Shield is the heavier build at about 10 lb with an aluminum housing and a weather-shield design aimed at window use, but its listing is muddled on specs and it has far fewer ratings. Buy the B20201 for moving air around a room; step up to the 3720 if you want a sturdier window-mounted fan.

• Choose the Lasko B20201 if you want a light, easy-to-carry 20-inch fan with strong airflow for living rooms, bedrooms and garages.
• Choose the Lasko Weather-Shield 3720 if you plan to set the fan in a window and want the heavier aluminum housing and weather-shield frame.