Hay Pellets are a very ‘green’ heating source. “Pellet stoves produce 90 percent less greenhouse gases than fossil fuels and are 10 times under the EPA emission limits,” May Miller said. “It takes 70 million years to grow a crop of gas or oil, 20 to 100 years or more to grow a tree, but only 70 days to grow a new crop of grass.”

Hay pellets burn just as well as wood pellets. The efficiency is calculated by the amount burned minus the ash content. So grass based pellets usually have a 1%-2% higher ash content which is insignificant in the long run