'Gouda vuurvast' builds combustion furnaces. To view such an oven from inside it has to be stopped and that costs money, a lot of money. We've simulated a realistic 3D model of an oven so you can experience what it's like to be inside. How the combustion works exactly and why an oven is so high. For (new) employees there is the possibility of mortar and training the special refractory bricks to build an oven.