This type of humidifier is fed by steam from a main supply rather than being generated locally by a self-generative unit.
High steam output per meter of lance.
Very low noise levels.
Simplified duct and piping requirements.
Close spacing where multiple lances are needed.
Low steam ejection velocity for efficient air / steam mixing.
Direct steam injection humidifiers
Type 20 and Type 40 Direct Steam Injection (SI) Steam Injection Humidifiers
Your closest Spirax Sarco is