Live Birth. After mating, females are pregnant for about seven months -- usually between 205 and 217 days. Instead of having a litter of several small babies like many mammals do, porcupines have one large baby. A baby weighs about a pound, typically ranging from 14 to 18 ounces. Their quills are soft when they're born, but the quills harden within an hour.
Fuel Cost. The cost of wood pellet fuel is usually given in dollars per ton; the average price of the fuel is typically around $250 per ton. The cost of a cord of wood, the fuel burned by a conventional wood stove, is around $200. The average home uses about 7.3 tons of pellet fuel or 6.5 cords of wood per season.
1 Mywoodpelletsolution.com offers a wood pellet heating system that starts at $4,995 for the system alone. 2  They note that the average installation job is around $1,000 to start. 3  According to MaineBiz.biz, the average boiler in the state of Maine cost an average of $19,000 for a system. However, with most jobs, the average installation, in addition to buying the boiler, can cost as much as $5,000 to $8,500. 2  While optional, a wood pellet bulk bin is ideal if you would like a place to store a large supply of pellets. 3  These bins can automatically feed pellets into the boiler.