Ahh.. Just no. A candle is about 85BTU's. If you're trying to heat up a one man tent, maybe you can get a degree or two. But a house? A 100W light blub close to 5X the heat emitted. Using the candle to heat up a clay pot, the air directly; doesn't matter, no BTUs are generated there. The only way to make more BTUs out of the candle is use it to light something bigger on fire (hopefully not your house).