How quickly do the wood pellets burn?

The wood grill pellets used in Z Grills burn at about 2.2 pounds per hour at high temperatures (more than 356 degrees) and 0.66 to 0.88 pounds per hour when cooking low and slow (Smoke setting or 225 degrees). A 22-pound bag of pellets can last anywhere from 10 to 25 hours depending on temperatures and conditions. The 700E model will use pellets faster than the 450A due to the larger surface area.