Ventless griddles: These griddles utilize a catalytic converter to wash the air, making them ideal for indoor areas without a venting system. 1 this kind of possibility is ventless cooking products. Ventless cooking gear takes advantage of filters to wash the air and remove smoke, grease, and other cooking vapors. https://restaurantandbarventilati64195.blogsvila.com/29694207/top-guidelines-of-restaurant-and-bar-ventilation