We just got our Z42 installed a couple of weeks ago so I'm still learning new things almost daily. Question for today is how much ash do you typically allow to accumulate before you start emptying? I understand that you want to try keeping a nice bed of coals but ours (along with a lot of ash) is almost to the bottom of our doors. We have been trying to keep the fire going as much as possible so it doesn't take long before we have quite a bit in there. I emptied some a week ago while everything was still hot but didn't care doing it with so much heat. With so much ash, we are unable to load as much as the unit can hold so overnight burns are a real challenge.