STS® humidifier

DriSteem's STS® (steam-to-steam) humidifier creates chemical-free humidification steam using boiler steam as its energy source. Boiler steam in the heat exchanger vaporizes clean fill water into humidification steam. No boiler steam or chemicals ever enter the humidified space, instead they return to the boiler.

Controlled by:

Dispersion devices:

Product Resources
Features and Benefits
  • Chemical-free humidification using on-site boiler steam
  • Easy retrofit for steam injection humidifiers
  • Passed rigorous tests to meet IBC standard and OSHPD pre-approval for Seismic Certification


Capacity: Steam capacities from 20 to 1600 lbs/hr (9.1 to 726 kg/h)

Control: ±1% RH, Vapor-logic® controller

Applications: Designed to use on-site boiler steam

Options: Water treatment system, weather cover, climate-controlled outdoor enclosure, and Drain-kooler water tempering device


New to the world of commercial humidification and evaporative cooling systems? Looking for an easy way to better understand the products and options available for your project? Our product selection guide can help you sort through the choices and point you in the right direction.

Get Started


Get in touch with your local sales representative for more information about DriSteem products and how to proceed with project planning.