We woke up this morning to or home filled withsmoke and the pellets in our top loading american harvest stove

on fire. It

had been completely cleaned before loading it for the night. The only thing that we have changed is the brand of pellets we purchased but they still have the low as content etc as oir others did, these pellets are made from oak. Earlier in the evening and during the fire i noticed a smell of what i am being told is creosote. I shudder to think what would have happened had dh not been awake? Does anyone have any ideas? Thank you