Cold & Wet · 30 minutes · Basic
Candles, Clay Pots and Space Heaters: What Actually Works
Honest numbers on candle heaters and the safe way to use them when the power is out and it's freezing.
This is for educational purposes only. Not professional medical, electrical, or safety advice.
Warning
Open flames and combustion appliances indoors produce carbon monoxide. Ventilate, alarm, and never leave them burning while anyone sleeps.
- 01
Know the real numbers
One candle gives roughly 35–40 watts of heat — less than a light bulb. A dozen tealights will take the edge off a small closed room, but they will not heat a house. Treat it as a warm corner, not a furnace.
- 02
The clay pot version
Stack two unglazed pots on cinder blocks over a small cluster of tealights. The clay absorbs and radiates the heat more evenly and cuts the drafts. It's a slightly better candle heater, not a magic heater.
- 03
Never burn gas or charcoal indoors
A gas oven, propane camp stove, hibachi or generator in the house is the single most common cause of death in cold-weather outages. No exception for 'just this once, it's cold'.
- 04
Fire rules
Candles on a non-flammable surface with 3 ft clear on all sides, in a container that catches wax, never in a sleeping room, never unattended, out when you sleep.
- 05
Heat the person, not the air
Every watt you spend warming a room leaks out. The same energy in a hot drink, a hot water bottle and a sleep system lands directly on your body.
- 06
Keep a CO alarm audible
Battery alarm in the room you sleep in. Learn the symptoms — headache, nausea, dizziness, 'sleepy' — and get everyone outside the instant one appears.