Knowledge base
The background reading behind our rankings: what heaters really cost to run, how to use them safely, and how to match one to your room.
5 min read
How much does a space heater actually cost to run?
The simple watt-hour math behind plug-in heaters, and why heating one room beats raising the thermostat.
4 min read
The plug-in heater safety checklist we use in testing
Overheat shutoff, tip-over cutoff, clearance distances and the extension-cord rule that matters most.
6 min read
Ceramic, oil-filled or infrared: which heater suits your room?
Three heating technologies, three very different comfort profiles — matched to bedrooms, offices and living rooms.
4 min read
Sizing a heater to your room without guessing
A practical wattage-per-square-foot rule, plus the insulation and ceiling-height factors that break it.