Best box fans

Top pick: Lasko 20" Box Fan. It's the one to buy if you want a plain, proven 20-inch box fan — the most-reviewed of the bunch by a wide margin, so you know what you're getting, and it's light enough to carry from window to window.

Who the others suit:

• Hurricane Classic 20" — the pick for real airflow: it moves the most air of these and has three speeds, so it's the better choice for a workshop, garage or pushing air down a hallway.
• SUGIFT 20" Adjustable — for someone who wants to tilt the airflow up or down rather than just straight ahead.
• Midea and Haier 20" models — standard three-speed box fans; fine if you find one at a sensible price, but the listings I found are parts-store pages rather than normal retail, so treat them as a fallback.

Skip anything that looks like a replacement-part listing — those aren't the fan itself.