Ok, this might now be the right page in the forum to post this, but I thought it was really cool!!
I was staring at a candle in my room, and thinking about all of that wasted heat when I started searching for how many candles it would take to heat a room. Obviously I knew that this wasn't a viable pursuit, but I thought it might lead to some interesting thoughts along the same line. A couple of web pages later I found a guy that had the right idea! It's obvious that a single candle wont do a lot for an entire room, but if all of that heat is concentrated at human height (say, sitting at a desk), then there may be something! Here's what I found:
http://heatstick.com/_Process.htm
Basically, the guy took several clay pots, a bolt, some nuts and washers, and a little time and made a candle heat storage unit! It gets pretty warm and reviewers said it was great for a small area heater. Let me know what you guys think, I thought it was nifty and I'm going to build one myself
