As I post from my phone about 10pm, this fire has been burning for about 3 hours. I used 8 Duraflame logs and 2.5 bags of charcoal. I am sure it will continue to burn for a while more. The heat radiated is awesome and not much smoke to speak of. It has been a great way to escape from my computer and hang out with the kids and the dog, while talking about the stars in the sky. I have had this fire bowl for about 5 years and never really enjoyed until recently. Charcoal and Duraflame logs really take all the pain out of building a fire. Just throw logs and charcoal in the bowl and light the paper wrapper on the logs. Sit around and enjoy!