I have FP with a damper and a gas line (starter) that runs underneath the grate. To the right of the FP on the floor is an insert for the key that turns on the gas. When we bought the home from a previous owner, I noticed there were no logs on the grate but underneath the grate is what seemes like the fake powder and embers you would find in a gas burning fireplace. I know it is not just old ash. I previously had an enclosed gas FP that had a bag of fake ash you could sprinkle around the bottom of the gas logs. This is what I have on this FP. We were told it was a wood burning FP, but why the fake embers and can I burn wood or is this meant for ceramic logs? I don't know the difference. Thanks!