Bahh, not an idiot, just underestimating. You've most likely got a 20lb tank. I have a 155btu burner, and I'd say I could get at least a good 5-6 brews out of it.Wade E said:Okay, maybe Im an idiot for stating a 5 lb.prop. tank as I dont even know what I have. I have what normally comes with a gas grill, so on average, how long will that last and i will fill my other tank but just want to have a basic idea.