In many production plants, where speed, repeatability and process continuity are crucial, classic manual booths - open or closed - are no longer sufficient. Their operation requires greater operator involvement, and any interruption in the painting cycle slows down the entire process and generates waste. On the other hand - full automation is the cost not only of the booth, but of the entire infrastructure: transport, powder recovery, control, integration. For many plants, this is simply not cost-effective. The tunnel booth solves this problem. It represents a compromise between a simple manual booth and an expensive automated paint line. Workpieces move through the tunnel - either manually or semi-automatically - and are painted on the move, without stopping the line. This significantly shortens the work cycle and keeps the process moving. The tunnel versions can operate in two configurations:- with vertical draft (air drawn in from above by an external dust collector), - or with horizontal draft (air flows through the booth from one side to the other). Unlike pass-through cabins, which always have a horizontal draught and can be either single or dual station, tunnel cabins offer greater flexibility and configurability - for example, with filters on the back or in a modular system with active zones. This gives a real advantage where cost and effect have to be balanced. In practice, a tunnel cabin means no downtime, stable process conditions, higher productivity and better ergonomics - without the costly implementation of full automation.