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:

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
  • Made in the USA


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

OptionsWater treatment systemweather coverclimate-controlled outdoor enclosure, and Drain-kooler™ water tempering device

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Product Resources

Brochures, IOMs , & Catalogs

Maintenance Resources

Wiring Diagrams

Vapor-logic 6 – Europe

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BIM Content

All of DriSteem products are available on the BIM object websites below. These sites include free downloads of CAD (.dwg) files, Revit (RFA) files, specification details, brochures, Installation and Operation Manuals, and more. 

Historical Manuals

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