Anyone have this or know much about it? Looking for an option other than the propane we currently have, which fluctuates in price quite a bit each year ($2.50 a gallon this year, been as low as $2.30 and as high as $3.10 since 2007). We also augment our propane by using a wood burning stove every day, which keeps the propane heater on our first floor from running all the time...