Trying to get heat the same way is a bit more work. What makes it worthwhile is that in mid-winter, the ground below frost level is warmer than the air.
Yup. Add the heat resulting from the extraction process and you get even more heat from each dollar spent.
1,888 posted on 05/29/2009 7:13:07 PM PDT by sionnsar
(Iran Azadi|5yst3m 0wn3d - it's N0t Y0ur5(SONY)|"Also sprach Telethustra"-NonValueAdded|Lk21:36)