Best portable space heaters under $100

Start with the Dreo Atom One. It's the one I'd hand most people: a thermostat so it holds a set temperature instead of just blasting heat, 1,500W of output, and a very strong owner rating — the safest bet for a bedroom or living room.

Who the others suit:

• Dreo Solaris Max (2nd Gen) — the quietest of the bunch, so best if it runs overnight next to your bed.
• Dreo Solaris Slim H3 — slim tower shape with an ECO mode; good for a narrow spot by a desk or wall.
• Lasko Artisan CX16550 — simple dial-style tower with a long timer, if you'd rather not fuss with an app or digital panel.
• Romswi oil-filled radiator — silent, steady radiant warmth for a whole room; slow to heat up but no fan noise or dry air.
• Comfort Zone CZ499R — oscillating fan heater with a digital thermostat, a cheap way to warm a small office.
• Midea quartz heater — tall, cheap, and directional; fine for spot heating a chair or doorway.

All are 1,500W-class plug-in units, so expect them to warm one room, not a whole floor.