The Terra-Cotta space heater can heat up an entire room with just a few candles that cost roughly 15 cents per day! | Diy heater, Candle heater, Space heater
Heat Your Room with 1 Candle plus Flowerpots, Nuts and Washers | Permaculture magazine
Stuck in a blizzard? Here's an inexpensive emergency heating system
Natural Candle Powered Terracotta Heater Will Warm You for Cheap
What Is a Candle Warmer? Plus, the Pros and Cons of the Device | Martha Stewart