The best energy-efficient space heaters help warm rooms and keep electric bills in check. We tested top models to find out which ones kept us toasty.

The Duux Edge 1000 is much more appealing than most convector heaters, with a smart, vent-free facia that looks uncluttered and modern. It’s an effective device, producing enough heat for medium-sized ...

A mixture of the brilliant and the slightly frustrating, the Mill WiFi Max Portable Heater 1500W is a neat-looking electric heater that can adjust its power usage automatically to help maintain more ...