 I can't do this. No, that's it. You shouldn't be doing this. Don't ruin it. Thank you. Drive thru a wood store. Thank you. We can stay parked there. Where? I think so. Here? Are you going to be a mathematician? Professor of Mathematics. Professor of Mathematics. So that we got the profile. Yeah? Yeah, we can just, if we're careful, we can just sort of get that quite nice and flush. Just sort of jammed up against the ceiling, basically. Everything good? We're good. If you want to film, I can just put my life on here. Do you want to record on that? Hi, Maya. Hi. Are you recording? Are you recording or not? It's just a thing. With this type of ceiling, you need a small wood. Small wood. Small wood. This is about two centimeters. Two centimeters. More or less. The benefit? It's to use a lot of wood. A lot, a lot of wood. Less wood. There you go. You're going to be counting the wood. How loud are we? The perfect situation is this tube. One quarter with braces. One quarter with wood. Two, two pieces of this size. It's perfect. And one half with iron and fire. You don't need to put too much wood. Too much wood. With too much wood, it's insufficient iron. It's insufficient iron. It's insufficient iron. It's insufficient oxygen. And less fire. The best wood in the garden. It's like lighting a fire with petrol. Are you taking measurements? Yes. We're going to get 300. Where is the CO2? The CO2 in the corner. Okay. So, rocks here. And this is with powder. With white sand. And this is hot. This is not bad. Cold. This is insulation. So, all this energy is reflected inside in more efficient combustion. So, it concentrates the fire. Yes. And when it's sunny, it's in the water, in the rocks, and in the chimney. Does it make that sound again? Like how? How, how? Watch out, it's going to hit your head. It came out once. It looks like it's coming out. Can you see it? Yes, it's coming out. Can you see it there? Yes. Hi, Andrea. How are you? But if you notice, it's not so much smoke inside. Yes, that's fine. As it starts to draw more, it'll suck air in. Rather than letting smoke out. Less wood and less smoke. Less wood and less smoke? Yes. It doesn't feel so much smoke right now. No, thank you. It says it's for the video. Yeah, so they don't want more heat. It's enough. And this is out. Okay. And with this, is it weird? Yes.